Paul Rudd [1] got extremely close to Michael Douglas when the two filmed Ant-Man [2] last year . . . almost too close. During an appearance on The Tonight Show on Monday, Paul told host Jimmy Fallon [3] that on Michael's last day on set, he decided that he was going to flash the legendary actor, Basic Instinct style. "I'm wearing a t-shirt and jeans, so I unzip my pants and I get it over and out. I'm like, 'This is going to be great!'" Paul revealed. "So I had to pull my shirt down so I wasn't exposed. Then I figured I'm going to sit down and when the scene starts and I'm going to lift my shirt up and just be there like this. The one thing I didn't take into account is that when I sat down, the waistband of my boxers was just going to push it up and back in. So, I knew it. You couldn't see anything, so I'm trying to pull my shirt down, trying to get it out, and he's doing his lines, giving you nothing. I should have just stopped but I didn't and it looked like I was basically pleasuring myself to Michael Douglas giving a monologue." Watch Paul tell the hilarious story above, then check out his stomach-turning game of "Drinko" with Jimmy [4].