VIDEO : J.K. Simmons Impresses and Terrifies With His Enormous Arm Muscles

You know J.K. Simmons, right? Hilarious and charming actor. Pitchman for Farmers Insurance. And if you saw his Oscar-winning performance in Whiplash , you'll know that Simmons is actually pretty cut. He wore tight black t-shirts and flexed his arms in rage throughout the whole movie, so it was hard to miss his arm muscles. Well, hold onto your biceps. Fitness pro Aaron Williamson uploaded a couple photos of the actor working out on his Instagram page, and E! News shared it with the rest of us.