Warp benefits from the rearrangement; without his brother's insight to lean on, he learns how to work more closely with the Flash.

That was part of the point, yes. Hopefully that'll translate over when they go back to working as a trio. 

Flash checks the time, decides they can afford a few more rounds, and swaps twins. He tells the computer to go easy on Warp: he's sure Impulse had fun bouncing round the course on his own, but his brother seems to need a little more guidance. 

In just the short time he spent alone, Impulse has already improved significantly. He's making around the same number of mistakes, but at much more difficult tricks.

That's great, but Flash is willing to bet his ability to coordinate hasn't improved. 

At least he has the advantage that he can stay one step ahead of Impulse literally, if not metaphorically, thanks to the difference in their current maximum speeds. 

He is actually not all that bad at teamwork, just - until he has a better idea. (And his better ideas are often actually better, but not always.)

Does he at least get better at communicating these better ideas before implementing them, that being the main point of this exercise?

It might, after all, be helpful to have someone who can move at speeds greater than Mach 5 on short notice. 

Well... yes and no. If he sees an opportunity he goes for it, explaining along the way. He does get better at delivering those explanations in a way the Flash can understand, but he's still, for lack of a better word, impulsive.

...they probably need to come up with a faster method of communication. He'll work on that.

In any case, eventually it's time to stop so the boys can make it home in time for dinner. Flash maaaybe cuts it a little fine on that front. 

"Same time next week work for you boys, or would another time be better?"

"Same time next week is fine!"

So Flash books the track for another training session the following week, and sends his sidekicks home. 

The zeta tube network can drop the twins back in that one phone booth in Toronto, unless they want to pick a different city. They could, technically, run all the way, but there are multiple reasons they didn't do that to get here, including the fact that the Justice League does not especially want it known that they have a training facility in Nowhere, Nevada. 

They take the zeta tube network back to that one phone booth in Toronto and run home from there.

The next week, they show up a couple of minutes early.

The Flash is, just barely, late. 

"Great, you're here! Shall we get started?" 

Neither of the boys says anything about the Flash being late.

A speed test reveals that Impulse's top speed has gone up since last week; he denies having pushed it, and it hasn't lifted very far.

Racing with Warp would be almost pointless, though, because Warp now clocks a solid Mach 12, and says he could probably go faster if he didn't have to worry about corners.

Impulse has no theories to offer about why they're so different.

He does notice that although his external speed is still lagging, he can run his mind much faster than his body, thinking and perceiving at a rate that keeps up much better with the movements of the other two speedsters in the room. This is useful in supporting his ongoing habit of tactical improvisation.

Overall it's a pretty good training session. If this is what they're like after a week, the Flash is going to have some really impressive sidekicks.

Ah, but what's their rate of mistakes with the holograms like? If it's low enough, he might take them out on patrol with him sometime soon. 

When he mentions that to the boys, Impulse laughs.

"If you want me to do a perfect run, I can do a perfect run," he says. "But the holograms are an opportunity to make mistakes without actually hurting anyone, so I'm taking advantage - push until I screw up, figure out how not to do that, repeat."

Well, that explains a few things. Flash is substantially less worried about Impulse's attitude now than he was a week ago.

"I would like to see a perfect lap, actually," he says, "just to make sure you're not accidentally training yourself into bad habits. I've done that a few times." 

He looks at Warp. "You're not doing the same thing, are you. You're treating it like it is real." It's not really a question. 

"Yeah. Well - sort of. I'm not doing what he's doing, but - there' a lot of stuff I wouldn't try if it was real, 'cause somebody might get hurt, and I have to learn it all sometime. So I'm treating it... as though it was real but getting the job done was important enough to be worth taking chances, I guess."

"That makes sense," Flash agrees.

He still challenges Warp to complete a round with no mistakes, though, along with his brother. Shouldn't be too difficult for either of them. 

Warp is a lot more cautious this round, but manages to perform adequately without making any mistakes that would hurt someone in the real world.

Impulse... is not a whole lot more cautious than usual. But he's cautious enough. He delivers his promised perfect run on the first try, despite some very narrow misses.

Flash reviews their results.

"Well," he concludes with a sigh, "you probably won't do more than mildly terrify a few random bystanders if I take you on patrol in Central City. Maybe not even that; they're used to me. Interested?" 

"Definitely!"