Crowbarmagic

The ones made out of money.

For the longest time I had no idea it was you! And it wasn't just the look.. The voice and mannerisms really did the trick to make me believe it was another actor (than professor Finnigan Flitwick).

Edit: Confused the names. Has been a while ago!

What is your chair throwing record (distance)?

I think it helps that they sound like the fog horns of ships. So we already unconsciously associated such a noise to something big and somewhat sluggish. Up the bass a little, make it sound a bit more "electric", play with the pitch a little, and bam: Big alien walker noise.

Or at least, that is how always imagined how the sound came to be, until the guy that actually did it told us how he did it.

Would you say the Captain went overboard?

^{I'm so sorry}