Early Tuesday morning Conor McGregor stunned the MMA world as he announced his retirement from MMA. While at first many believed that the featherweight champ’s Tweet was a joke, sources confirmed that McGregor was indeed serious about retiring. It didn’t take long for his coach, John Kavanagh, to confirm the news via Twitter.

Understandably so, the MMA community began posting their reactions to the news on social media. One of the biggest reactions was that of former UFC featherweight champion Jose Aldo, who McGregor KO’d in 13 seconds at UFC 194.

Aldo then deleted his Tweet, however a screenshot was captured by MMAFighting.