Bill Hader appeared on Conan in late September and offered up some funny, and on point, impersonations of his former Saturday Night Live castmates, including Fred Armisen and his tendency to over-gesticulate.
Armisen, who stopped by Conan on Monday, was clearly not amused by the impression and retaliated with his own take on Hader's mannerisms.
It's all in good fun though — what's a bromance without some friendly competition?
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