Atta boy, Joe.
Way to get karma on your side before Saturday's wild-card showdown against the Steelers.
According to a tweet from a waitress in Pittsburgh, Flacco left a $150 tip on a $208 bill while dining out last night after the team arrived.
That's well over the customary 20 percent. It's a very elite 72 percent.
The waitress tweeted a picture of the receipt (she later deleted it) with the message, "Thanks Joe Flacco. Didn't know you to look at you but that made my night."
See, even in a city where Flacco probably isn't too popular, Joe Cool makes friends.
I expect Steelers fans to remember this tonight and behave accordingly.