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Sounds a lot like what happened to us during our first practice round at Sacramento. We had been drilling out a screw with a busted head that held the Victor to our electronics board. Apparently, some filings got into the speed controller... drive started failing towards the end of the match. We got on top of the hill, then the robot just started spinning around and around. Our driver didn't know what was going on; one of the FIRST people yelled at us to hit the e-stop, we did, it kept spinning; that person came over and hit the e-stop himself, it kept spinning; the match ended, it kept spinning... There was also some wisps of smoke rising out of the bot. The field people eventually ran in there, lifted the bot up, and turned it off. The speed controller had shorted.
We were very glad we had cut a hole in the top of the Lexan that day, or else they wouldn't have been able to turn it off.
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