You wait until everyone is inside before you set off the bombs

"THIS - IS - FOR - SCIENCE!" you shout at the top of your lungs, merrily pressing the big red button on your remote control detonator. Beneath your lab, the piles of high explosives you have been keeping wired for just this type of incident ignite.

There isn't even time for the people inside to scream.

1. You ditch the detonator and flee in the opposite direction of the sirens
2. You stay on the scene to admire your destructive handiwork
3. You wake up at your desk, groggy