While watching a reality TV show on your DVR/TiVo/whatever you come to the commercial break just before they announce something. You fast forward a few times (in 15s or 30s increments) and wind up moving passed the announcement and into the contestant's reaction. In vain you back up so you can pretend you didn't already see the person cheering/crying and watch the segment from the beginning.
"Dude, major preevo there! She was straight up crying--you knew she didn't win!"