Joaquin Phoenix Acts Strangely on Late Show with David Letterman

Was it Andy Kaufman-like brilliance or is this dude just on something? Check out this clip of future-rap star Joaquin Phoenix falling apart on Letterman; click here for more footage.

Updated 04.25.17 4:07PM ET / Published 02.12.09 2:42AM ET

Was it Andy Kaufman-like brilliance or is this dude just on something? Check out this clip of future-rap star Joaquin Phoenix falling apart on Letterman; click here for more footage.