Example: 20 seconds left in the 4th.....a team is down by 3 or less........that team is on their own 22 yard line.......QB takes a shot for his WR, who is around the opponent's 40 yard line. Defender sees what's likely about to happen and blatantly interferes. Without a spot-foul penalty, now that team only gets to move to their own 37 yard line. And oh btw, about 8 seconds went off the clock, so not only are they still 13 yards short of even being at mid-field, but they're also working with only about 12 seconds.