"Traveling out of bounds" (Video)

[so cal lurker]

While I get that it can perpetuate a myth, to those who know the rules (and believe that the official knows the rules), the signal does communicate exactly what happened . . . just guesing, but it may be that the NCAA refs who have done this believe that the players/coaches do know the rule and will know what was called (and that, for example, it wasn't an overly quick 5 second count)