Over at Close Call Sports aka Umpire Ejection Fantasy League there were seven examples of OBS posted in this thread.
Close Call Sports: Rule 7.06: Obstruction, What a Pickle!
The test is to determine which are type A, type B, and place runners. I have some questions on the plays and if some of them are even truly OBS. I'm using it as a learning tool, and would like to hear what others think about the videos. If anyone cares, my comments are posted under jdbr78 and I wouldn't mind knowing if I am wrong.