. >> stephen: thank you, alan alda. thank you so much for joining me.da, the world science festival going on right now in new york thug ( cheers and applause ) >> stephen: that's if for the report. good night! good night! ( cheers and applause ) all right, you're definitely going to get this one, you ready? uh, yeah, i guess. so he shoved it up his (bleep). i have no idea what you're doing. it's christopher walken! sounds like rosie perez or something. come on. now, that was a perfect walken, and it's going to win me the talent show. what talent show? the one i throw for the pub crawl. are you doing that again? yeah, well, it's not really a talent show anyway. i mean, she just gets the most untalented people in philly to enter the competition with her, so that she can win it. and she never wins it anyway. guys, guys, guys! i got some news, some terrible news. we've got a huge problem. can we stop for a second and talk about this? - what? - what's with that jacket? i was going to wait on that. (all clamoring) well, first of all, it's not a jacket, it's a