Aziz Ansari and Chris Pratt’s Cancer PSA is the Funniest Cancer PSA

"Parks & Recreation" co-stars Aziz Ansari and Chris Pratt want you to "give a s**t about cancer" by getting your friends to join the national bone marrow registry by swabbing their mouths, and they have the funniest way of communicating it. This is definitely the hardest I've ever laughed at a cancer PSA (the better to get the word out, of course.) Chris Pratt is really the star of this one—Aziz plays the straight man: