"Hi Ms Lensherr! Are Emily and Edie home?" 

"Right now, they're...busy. I can tell them you called when they get back."

"Okay! Tell them I got superpowers in the thing that happened and I want to figure out how they work and I figured they'd have good ideas for what to try so I was gonna invite them over for lunch and science." She's hardly going to be doing the secret identity thing now that she looks like so much liquid mercury, is she.

"Oh, you too?"

"Oh, them too? Oh that's so great, they're going to be so good at being superheroes if they decide to go that route. Tell them congrats."

"I will. Not that it's entirely necessary, Emily is currently beating gravity in a fight and over the moon about it." She considers that phrasing. "Metaphorically."

"That is so cool, I hope they have an awesome time. See you around!"

She calls her next-nerdiest friend!

“Hi, Sam,” says her next-nerdiest friend, sounding a little distracted.

"Hi Amanda! How's your winter break going? I have superpowers!"

"Wow, really? That's so cool! Uh, things are going mostly fine, but a giant earthworm just destroyed the shed in the backyard."

"Oh shit I'll be right over!" Hey mom hey dad she's borrowing the car, Amanda's having a giant earthworm problem byyyyye

The earthworm is writhing around Amanda's back yard. The shed is definitely totaled, and in fact might be difficult to differentiate from the remains of the also-totaled patio. It's...bigger than "destroyed the shed" might imply. Actually if it goes unaddressed too much longer the foundations of the house are at risk. 

Samantha is some combination of not clever enough to figure out how to use the speedup power while driving a car and too smart to try, but she does break the regular speed limit and gets from the driveway to the back yard at 10x.

She's not going to make the same mistake twice when she has so many mistakes she hasn't even made once yet. She drops back to realtime. "Hey! Can you understand me? You need to calm down." Hopefully if it's smart enough to be people it's also acquired at least one of sight, hearing, or telepathy, because she doesn't speak Vibrations or Pheromones or whatever earthworms use to communicate. If they communicate.

Well, it definitely notices her shouting! You can tell by how it swings its head (or is that its tail? Becoming huge hasn't made it easier to tell the ends apart) at her like a medieval flail. 

She ducks on instinct, and speeds up halfway through ducking on much newer instinct. Out comes the distortion blade in case it comes back for another pass. "If you can understand me, hold still and I won't have to stab you!" Not her most diplomatic speech ever. At least she remembered to slow down for it so it didn't come out in chipmunk mode. Back to fast in case it has other ideas. 

It hesitates, some primal instinct identifying the distortion blade as Bad News, then dives back into the soil. 

That's not actually going to stop it from damaging the house more, is the thing. And as far she can tell it's still mentally just a worm. She goes to 10x and makes a swipe straight through the unresisting soil at where it logically has to be. 

The soil is unresisting. The worm...less so. On the other hand, her blade is pretty hard to resist. 

Both segments of worm--not halves, she only cut off about a fifth--erupt from the ground, spraying worm blood everywhere. 

Does it look like they're about to grow into two entire worms? If not she'll chop the bigger piece into two pieces.

Nope! The places where the pieces of worm were once joined are bleeding freely, not growing back. The smaller piece whacks desperately at her with a club-like end.

That's good, because she doesn't have a ton of options other than lightsaber. She stumbles back from the flailing end, recovers, cuts again.

This worm is flailing REALLY DESPERATELY. In increasingly small pieces. Bits of blood and solider chunks of viscera seem to occupy all the places where it's possible to dodge away from potentially dangerous bits of worm.