Welch doing Chemistry Demos
Here are some Chemistry related demos we got Welch to do.

Click to watch a video clip: (divx codec needed. Local Copy)

[1] Welch detonating a hydrogen balloon.
[1] [2] [3] Welch lighting bubbles of gas on fire (this isn't too exciting if you've ever seen fire before).
[1] Me picking on Welch (he he).