Explosions!

[palistov]

AddBodyForce is for bodies in an entity. For instance, you would use AddBodyForce open an individual desk drawer; since the main body of the desk is static, simply using AddPropForce likely won't yield any sort of desirable result.

You'll need values in the thousands to see movement. Try something like 15,000 instead of 500. Tweak the 2 until you get the appropriate movement. I'd wager a 4000 might give you the upwards jump you're looking for.