Q:

The room, the table, and the chainsaw

You're in a sealed room with no doors, vents, or windows. All that is in the room is a chainsaw, which has a full gas tank on it, and a table. How do you get out?

A:

Forget the chainsaw and the table. You:

 get in the tank, start the engine and force your way through the wall.

A:

You 

 Saw the table in half, then the two halves make a (w)hole, then you escape through the hole.

A:

Another possibility that doesn’t require anything other than yourself:

 Run laps around the room until you wear yourself out. Once that happens, you are out, so you’ve escaped the room.

