Woodchipper, car bomb, garbage compactor, fire, a single large rock, multiple smaller rocks, open windows, closed windows and some force... The list goes on and on

Update:

• drum of boiling water
• large cat exhibit at the zoo
• thrown from a highway bridge
• snake pit
• drowning in a cesspool
• explosive butt plug
• fire ant
• flying with Tom Hanks in a movie

A bit exotic perhaps, but strapped to a rocket and hurled at a building.