When Warp sees Flash start to pull ahead of him, he grins and puts more effort into acceleration.

There's another pond in the way, coming up fast; he takes a risk on trying to run across the water, and this time figures out the trick of it.

Flash just breezes across it like it's solid ground. 

He stops accelerating once he has a solid lead on the boys, wanting to keep an eye on them so he can pull them out of trouble if necessary.

Warp... does not stop accelerating. From Mach 2 up through 2.1, 2.2, 2.3, 2.4, 2.5... he doesn't have a speedometer on hand but he can tell he's going much faster than he or his brother did in their little game of tag.

As he continues to accelerate, he loses hold of the quietness trick a few times. Loud sonic booms echo across the countryside.

Impulse's acceleration is not so steady. He nearly catches up to his brother - falls behind, his speed staying constant while Warp's continues to increase - manages to put on a little more speed somehow or other - repeats this pattern several more times.

To begin with, Flash can pretty easily accelerate enough to stay ahead of them, even turning around to run backwards for milliseconds at a time, so he can make sure they're still following. 

The gap between them slowly closes as he gets more confident, and therefore careless, of his lead. 

Warp glances back at his brother during one of the times when Impulse nearly catches up.

There is definitely some significance in this look that is not legible to outsiders.

But nothing comes of it immediately; they keep racing, with Warp pouring on speed at a more or less steady pace and Impulse catching up and falling behind over and over again.

Toronto begins to be visible in the distance.

Flash stops accelerating again, in preparation for hitting more densely-inhabited areas where they'll need to be more careful, but doesn't actually slow down yet.

Warp... does not stop accelerating.

There's a lot of suburbs and outlying towns to get through before they find their way into the city proper, but the boys seem to know the terrain well enough to stick to the less-trafficked areas. Lots of long stretches of road without any cars on them.

Flash's lead shrinks, then vanishes. 

He follows Warp, sticking close behind him since the kid seems to know where he's going. 

Their lead on Impulse keeps stretching, and he keeps having a harder and harder time closing it.

And eventually, he turns off the road Warp is following and heads down a different one.

Interesting.

Flash guesses almost immediately that Impulse has taken a shortcut - is Warp deliberately leading him by a longer route? - but by the time he figures out he'd probably be better off following Impulse, enough distance has elapsed that there's no point switching tracks.

Once he's close enough to their destination to plot a safe route himself, he'll put on a burst of speed to overtake Warp so he doesn't come in dead last. That would be embarrassing. 

When they arrive at their destination, there's a kid in jeans and a hoodie leaning against a wall very close to the zeta tube entrance, playing Candy Crush on his phone. He looks up at Warp and the Flash, for all the world as though he's been there for an hour.

"What took you?" he inquires, smirking.

...Warp starts laughing so hard that he has to sit down on the sidewalk lest he fall over.

...yeah, Flash is just glad he managed to beat one of the twins. He can tell they'd never have let him hear the end of it.

So they're doing the unmasking thing? Makes sense; they are going to be working together for a while. He'll wait to reciprocate until they're somewhere more secure, though.

"OK, I'm impressed," he admits. "But could you have pulled off the same trick in a city you didn't know quite so well?" 

"Might have," says Impulse. "Warp wasn't leading you on a wild goose chase or anything, he was just taking the safe route with a minimum of obstacles and leaving me to approximate a crow as best I could. It would've been harder to navigate but the principle would've been the same."

He puts his phone away.

"And I only beat you by about two seconds, I just couldn't resist the joke."

"I figured."

The zeta-tube entrance is disguised as a disused phone booth. Opening it and stepping inside, he waits for the system to scan and acknowledge him - *RECOGNIZED: FLASH, DESIGNATION 04* - then gestures Impulse to join him inside the booth. 

In he goes!

Flash fiddles with a few buttons, provides a confirming voice print, and a green light scans Impulse from head to toe. 

*AUTHORIZATION GRANTED: IMPULSE, B-04*

"You might as well go on through to the Nevada facility," Flash says. "I'll send Warp after you, then follow myself - it's only set up to take one person at a time."

"'Kay."

Rather than setting it up himself again, he says, "The code is zero-zero-three. Wait 'till the door's closed or it'll light up the whole street." 

He steps out of the booth and closes the door.

And Impulse enters the code.

*RECOGNIZED: IMPULSE, B-04*

There is a flash of white light, accompanied by a whirring noise, and when it clears he is somewhere else.

He is standing just inside the entrance to what looks like a fairly high-tech building. The ambient temperature is noticeably warmer. Behind him is the zeta-beam entrance, just powering down after transporting him:

He still has his costume on under his civilian clothes; he takes a moment to put the civvies away in his backpack, then gets out of the way of the zeta tube and examines the lights on the walls.