Don't challenge Tina Fey when it comes to cheese or things will real.

That's what Rachel Maddow and Jimmy Fallon learned as they witnessed Fey go hard in a game of 'Know It All' on The Tonight Show last night.

Things ran smoothly through the 'dog breed' and 'rappers' categories but when Fallon selected 'cheeses' as the final showdown, Fey went all in.

We wouldn't ever want to get on her bad side.

Via YouTube