Ok, this question is mainly for @CFB_Rules
but anyone can give it a shot. A fan was just on the field in the Rams-49ers game. So imagine this scenario.
Rams ahead 27-23 with three seconds left in the game. The 49ers do some crazy thing and as Deebo Samuel sprints for the end zone, there's a Rams player in hot pursuit. Unclear whether the Rams' guy will chase him down, but it looks like Samuel will make it. Big enough lead. But...the Rams player (say, Ramsey) is closing, so it'll be close. From the 49ers side of the field, a fan wearing a 49ers jersey sprints on the field and tackles Samuel at the 5 yard line, preventing Samuel from scoring. Clock reads 0:00.
The game is in SF. The fan is wearing a SF jersey. By all appearances it's a SF fan in his favorite team's home stadium. His "tackle" of Samuel prevents the 49ers from winning the game, and there's no time left on the clock.
What's the ruling on this? Is there a penalty? If so, on who? It's a SF home game. The fan *appears* to be a 49er fan. Why would he do this? Who the hell knows. Drunk. Maybe he has a lot of money on the Rams even though he appears to be a 49er fan. Maybe he's a closet Rams fan and this is all a ploy. There's no time for an *investigation* into this. A ruling on the field needs to be made.
Is there a penalty? Why would there be a penalty on the Rams? What did they do wrong? Would the ref make a ruling that Samuel would have scored and award SF the touchdown?