Yep i did it ,even after being told by guys that have the experiance ,they said and i quote,use carb drops to carbinate beer that has already been bottle.did i lsten,eh ,a little bit ,but,i was waiting on those carb drops to arrive from the brew supply gods ,lol ,anddddddddd ,so i thought ill just see what happens if i try to carbinate a couple beers useing corn sugar,lmao,,wellllll ,i added the corn sugar to the unexpecting bottle of home brew ,Yup it spewed its contence all over the place ,so boys and girls ,do as the brew masters tell you to do ,or ,you can experiment ,as i did,and find out the hard way . yes the info i recieved was dead on , DO NOT CARBINATE YOUR BEER THAT HAS NOT HAD A PRIMING AGENT ADDED TO IT BEFORE IT WAS BOTTLED ,WITH CORN SUGAR USEEEEEE CARB DROPS ,LMAO YOURS TRULEY BULL.