We've had a disable switch for some time now, but it disappeared sometime over the summer. This year, on a slow day, we decided to have some fun. Our disable button is now on a long cord so someone can always have it in hand while testing, and is made out of a aluminum handle machined (by a student, for those who think thats important) to conform to the palm of your hand with a big red button on top. Looks kinda scary, in a way. Almost like its the button to let loose the ICBMs, or something of that nature.
Anyways, I would definitly recommend something that is VERY easy to get to for use while testing. Never know if a small program change will make your 'bot flip out, or when someone will bump into a control stick.
~Tom Fairchild~