@Riot will you answer this for me???

Hiya, this thread is about everyones favourite fat guy!!! (Sorry Urgot)

Just a simple question, but why can't Gragas cast Body slam while he is channeling Drunken Rage? Was this a feature during internal playtests but phased out because it was too OP? Or was it never tested in the first place? I just want to know this, because he feels so much clunkier without it, i've been playing him for about one week but I still mash E whenever I channel Drunken Rage because i feel that it should be working, I can understand that he doesn't want to spill it by trying to make his opponents go splat, but come on, a drunken fat guy can't care that much about his booze.