Anyone killed Forward but not reverse?

I had my Firebird EVO out tonight. It's a 6 cell with stage 2 motor. I also run a pair of soft slicks stretched over hard slicks to increase the diameter to make it faster. I've been running this for about 2 weeks.

I took it out this time and while driving forward, it slowed down and stop, like the batteries died. I picked it up and smelled hot electronics so I shut it off. I hook it up now and everything works but going forward. Has anyone ever burned one of the channels in the fets and not the other, or do you think this is a different problem?

I don't know why it burned up, people run more than i do on stock electronics.