I said the same thing to my wife as soon as it happened.
At the same time I also told my wife that if we were the “old Lions,” we would come back from the 2 minute warning commercial break with a retroactive flag for delay of game. We have been told repeatedly that they can’t go back and look at delay of game and whatever the call is on the field has to stand. But in the old Lion days, nobody gives a shit. So I held my breath hoping I didn’t hear “while we were gone for the break the refs got together and decided to call a penalty on the Lions.”
Under the fine print of the rule, he’s allowed to jump as long as he is leaping from at least one full yard behind the LOS. That’s why you don’t see it much. Hard to jump four yards over a group of grown men while maintaining balance and full force ahead speed.
I forget who they were playing when they got the penalty in their favor, but the commentary team explained it on the spot. That’s the only reason I know the rule.