Car flew away and then game now stutters every five steps.

[fawkernot]

I've played this game myself for about 30 hours. I had a couple friends join in here and there and still no problems. But, while playing cop-op with one of my friends, I walked out of the motel and my car was flying through the air and fell into the skate park.

Ever since then my game hitches every five steps or so but not on my friend, who is the client not the host. It's really baffling, I tried all the basic fixes but it still persists.

Any help? It sucks we were about to beat the game I think.