Robert Downey Jr. and Jimmy Fallon Team Up For an Absurd, Unrehearsed Commercial Parody

In the market for a new allergy medication? Jimmy Fallon and Robert Downey Jr. can help narrow down your search. The late-night host and Dolittle actor just joined comedic forces to spoof a commercial for an allergy medication dubbed Zynerma, and the made-up drug has all the qualities you definitely don't want in a decongestant.

Dressed in ridiculous wigs and '90s dad-like outfits, Jimmy and Robert didn't rehearse the absurd lines before the cameras started rolling, and it certainly showed as they broke character left and right while reading from the cue cards. Jimmy couldn't help but let out a chuckle while declaring, "Best of all, they're shaped like Flintstones characters. Not the pills — my nipples." I mean, can you blame him? Watch the hysterical commercial parody above, and if you're still in the mood to see Jimmy lose his sh*t during a sketch, may we suggest his "Cue Card Cold Read" video starring Jessica Biel?