http://www.imdb.com/keyword/yanked-off-bikini-top/
There's a list of movies that allegedly have some sort of bikini top getting yanked off.
Starting with an episode of Family Guy, "The Thin White Line", from 1999, one of the first and still most major top-yanking clips ever shown in animation.
http://www.familyguyepisodes.tv/fami...te_line. html