not bad... certain male performers likje manny ferrara, ben english, mr pete, erik everhard perform the jackhammer shit more often... starlets seem to dig Tommy Gunn doing it
3 good scenes i can think of right now that include this sort of fucking is
1. Ben English and Mark Ashley doing Sara Stone and Brandy Taylor hard in reverse cowgirl position - lots of bouncing tits... Scene is from Rock Hard 5
2. Jezebelle Bond being done in reverse cowgril from Mr Pete Unleashed
3. Lorena Sanchez takes turns sitting stationery on a line of Dicks...each one jackhammers her hard - reverse cowgirl part last at least 10 mins - scene is from GrandSlam
also see loads of euro scenes from allinternal, primecups, tamedteens and spermswap sites