A Junkrat main, that was really bad and you got lucky. Even if they have been gravi surged or w/e. Do not point blank ult unless you are in a dire situation. Your ult can be targeted the moment you press Q, even if it takes time to be able to do anything with it. It can be targeted and destroyed. Doing it point blank literally just says 'Hey guys, shoot my tired and blow it up. Thanks"