Happy 21st birthday, Johnny Manziel

They grow up fast, don’t they?

Manziel, who hadn’t tweeted since Aug. 1, sent out a tweet in the wee hours of Friday morning that simply said, "Twenty First. #Remembah? #Muhhfu #Worst." (Those hashtags must be some inside joke or he just started celebrating the occasion early.)

In honor of their signal callers’ milestone birthday, the Aggies released the following video Friday afternoon, titled, "There Is Only One Johnny Manziel."

That certainly is true.