You stare at the lighter, the fork and the rope, then start thinking:
"What would MacGyver do?"
Time is running out and you need to act fast before the marshmallow explodes. The fate of the free world rests on your shoulders...
Do you:
Toss the light lighter into the marshmallow wall
Place the rope in wall like a wick and light it on fire?
Tie the rope to the fork, stick it to the ceiling, climb up and burn a hole to escape?