Think Twitter is just another pointless social networking tool? NASCAR does not seem to think so. Friday at Pocono Raceway, Denny Hamlin said it was a conversation on Twitter that drew a hefty fine by NASCAR.

SI.com’s Tom Bowles takes a look at what Hamlin had to say about the issue and, after some digging, found the conversation that got Hamlin in hot water with NASCAR.

Hamlin believes Twitter conversation cost him hefty fine (SI.com)