I didn't realize John Mayer was funny until the advent of Twitter, but the singer has a history of pulling pranks. Once he got on stage with Sheryl Crow wearing a bear costume and he recently drummed up some publicity for his friend Rob Dyrdek by carrying him out of a club and then Twittering about how he had to get his stomach pumped, writing, "In triage at Cedars with @Robdyrdek. When the contents of his stomach hit that silicon bag and we all saw it, we just broke into applause." [People]
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