NFSU2 - Dyno Glitch

I was upgrading the performance parts for this Mazda RX-8, and I decided to tune it up in the dyno. (After it finished loading) Out of nowhere I see people standing around the car, (like if it was before a race) clapping and cheering as the car burns out in place and revs its engine - & all of this happening while the car is half-way on the dyno. Every time I run it on the dyno, the jumps wildly, like the hydraulics are on steroids. After seeing this a few times, I knew I had to record it.