Wing/Referee Who's call is it?

[shave-tail]

The "who's call is it" always bothers me. It's the responsibilty of the "4 or 5" to get it right...if you see it, flag it, even if you need to run across the field. In this case you can't call this play dead as a false start because its only a foul at the snap. The back has the opportunity to reset or go in motion. An example would be if the snap count was on three and the back jumps on one, he would have the time to reset.