Unusual Throw-In Violation

[Nevadaref]

How embarrassing! Seems to be a case of tunnel vision. The covering official became so focused on looking for a touch to start the clock that he failed to observe other aspects of the play. This is what happens when people only officiate one thing at a time. There are usually multiple thing going on which need watching and the official must decide how to parse his attention to each. That is what makes officiating challenging.