Starlight Glimmer1 is here to rock your world!

Spike *very carefully* placed a rock on Twilight's head.

"Hey, what--" Twilight shook the stone off. "Spike, what are you doing?"

"Heh, yeah, hard to balance stuff on that rock," Rainbow Dash landed beside Spike with a small pile of gravel in tow. "Brought you some more rocks. Maybe you can pile the smaller ones around so that the big ones don't roll off or something."

"Rainbow!" Twilight brushed the gravel Spike dumped over her back to the ground. "You're in on this too?"

"Woah now!" Spike backed away. "The rock just moved!"

"I am not a rock!" Twilight took to the air. "Stop it!"

A brick landed squarely on her head.

"I balanced one!" Derpy shouted from above. A second brick fell perfectly on top of the first one. Unfortunately, Twilight wasn't able to shake either one off because they'd been impaled by her horn.