15 YARD FACE MASK FOUL - Enforced As A "tack-on"?

[raiderfan]

regarding facemask infractions... During the Dallas-Giants game, a replay of a run, I was certain I saw a Dallas lineman pull the facemask of his teammate who was the runner. The talking heads were talking about something else which was the reason for the replay and there was no flag on the play. The facemask grab was a quick pull and let-go. The Dallas lineman surely didn't intend to have his hand end up in the facemask of his teammate but nevertheless it happened. I work high school games. Although I've never seen a facemask infraction of this nature, I would make the call and enforce the penalty. Safety being my motivator.