At his Chicago tour stop last week, Hugh Jackman took a dig at BFF Ryan Reynolds when he quipped after performing a number, "Let's see Ryan Reynolds do that!" Now Reynolds has clapped back with a hilarious video in honor of Jackman's 51st birthday. "Hello, Hugh! I was just gonna wish you a happy birthday...then I saw what you said," Reynolds deadpans in the video, which shows him sporting a birthday hat. "In a word? Hurtful." Reynolds then proceeds to belt out "Happy Birthday" before declaring, "I'm not even ____ professionally trained, Jackman. You piece of s___________"