Kurt Steiner of Emporium, PA is the world record holder for stone skipping. From the website:
Not only did he outskip all other competitors, but no one had previously seen a skip in competition with such an amazingly high count. The rapid-fire pitty-pats resulting from the cast made counting very difficult, but the judges settled on an official count for the day's competition of 34, which sealed a first-place finish for Steiner for the 2002 competition.* With video cameras present that day, officials felt it might be worthwhile to review the video footage, since the skip very well may have set a new world record. Upon review, it was determined that the skip had far exceeded 34, and was worthy of submission to the Guinness World Record committee for authentication. It has taken over a year, but the Guinness officials have declared Kurt's skip a new world record, with a count of 40!