Conan O’Brien and Stephen Colbert Have an Uncomfortably Close Chat

On last night’s Late Show, there was a meeting of the late-night minds when Stephen Colbert caught up with Conan O’Brien — but he made them do it all in the form of a new (and debasing for O’Brien) installment of “Personal Space,� in which they both stick their heads in a small cardboard box then have an awkwardly close conversation. “What have you learned over 25 years that I haven’t learned in 14 years? What’s the next 11 years? What am I going to learn? What do I need to know about having the longevity that you have?� Colbert asks O’Brien, seeking some handy late-night-host wisdom. “You’re gonna learn: Never humiliate a guest,� O’Brien tells him before staring directly at the camera inside the box. After some hair-brushing, forced crying, and Irish singing, the two start to run out of oxygen and things get even more awkward. “I haven’t been able to think straight for about 30 seconds,� O’Brien says. “I just saw my grandfather, and he passed in 1976. Could someone call 911?�