Warrior 9920 messed up?

[Jasper]

I drove my 1/8 buggy today on a skate park. The ground was wet but there were no deep areas of water (plassen in Dutch) But after 5minutes driving the esc was acting weird. When I hit the throttle you hear a very weird beep and the pinion is moving: left-right-left-right etc. and very fast. The motor and esc were the whole time hand-warm. I drove back to home and made a video of it with pinion mounted and without.

With pinion: http://www.rcpics.net/view_single.php?medid=74207

Without pinion: http://www.rcpics.net/view_single.php?medid=74208

Setup:

- Warrior 9920
- Feigao 7XL
- 46 spur
- 14 pinion
- 16 GP3300