At least 5 in that last drive alone. The Ravens D-Line basically teabagged Dalton for ten minutes on national TV. It was downright embarrassing.
Now, the last play in this game, this is real entertaining. Much like the intentional 12-Men penalty at the end of SB 46, the Ravens appeared to have called the play "hold everyone". They hike the ball to the punter, and the punter retreats into the end zone while the BAL line just grabs on and holds everyone they're blocking. Flags fly everywhere, but Harbaugh doesn't care. As a Bengal finally approaches the punter, he steps out the back of the end zone. The result of the play is a safety, and there's no extension of the game because it was technically offensive fouls. Game over.
A pretty hilarious playcall to end the game, even if it's totally unsportsmanlike and you could argue it as a "patently unfair act".
