Freegans part 30

Cara
"Cara, what's going on?" asked Lucy. I watched Ben, Matt, and Kestrel as they attacked the robots. Matt turned to us, and mouthed the word, 'Run'. "I believe that they mean to have us escape while they get killed," I said.
"What?! No!" Lucy looked shocked.
"My feelings exactly. You and Madiza stay here, and I'll go help." I clicked my heels, re-igniting my levitation boots. Lucy didn't protest. She seemed perfectly content to stay there where it was safe. I was about to head over, when I noticed that Madiza was digging around in my knapsack, which I had completely forgotten about.

"Madiza, what are you doing?!" I asked. She looked up and smiled.
"MacGyver!" she said. I had no idea what she was talking about, but to my surprise she pulled out several odds and ends, which she quickly began putting together. There was a vial of some weird liquid, though not the poison from earlier, a round glass ball, and a water bottle, none of which I remembered being in the knapsack earlier. I half wondered if she hadn't slipped the items in when I wasn't looking.
She poured the liquid into the ball, which had a cork stopper in one side, and handed it up to me, along with the water.
"Fly over, pour in the water, then drop the ball on the metal people! It'll make sure the performance ends with a bang!"

I wasn't sure if this was such a good idea, but Madiza had been right before. So I grabbed both things, and ran through the air until I was over the heads of the robots, though as far away from our friends as possible. I pulled out the cork, poured in the water, and quickly replaced the cork. The mixture began to hiss and smoke, which made me nervous. Down below, Kestrel saw what I was doing, and his eyes went wide. Grabbing Matt and Ben, he ran like heck to the rope, and began swinging them over the pit. I dropped the ball. At the same moment, it felt like something wrapped around my foot.

The resulting explosion sent me flying through the air. I was temporarily deafened by the blast, and had no control. However, just before I could slam into the wall, I felt a sharp jerk on my leg, and was steered out of the way. I saw my friends running out of the cavern, and down a branching off tunnel. Madiza and the others were holding on to a long rope, the other end of which was wrapped around my ankle. That was the only thing keeping me safe. Thankfully, it was very sturdy. Looking down, I saw that there was a new hole in the ground, and most of the robots had either been blown to bits, or fallen down the new hole. Finally I was able to right myself, and I floated down towards the others. Almost as soon as I was back on solid ground, if not sooner, I was enveloped in rib-crushing hugs by my friends.
"That was INSANE, Cara!" said Matt. "How did you do that?!"
"Madiza made a bomb, and told me how to use it," I said. Speak of the devil, she smiled, and sang softly,
"All around the underground,
The robots chased the children!
The robots all fell down a deep well,
Oh, it was bewild'ren!"