Crap. Now I have to search for that too....? 
1) http://www.webtoons....5&episode_no=99
Viole was a threat the whole arc, but Badass moment started there when he and Wang joined force. I remember when the company was still doing it, they noted in S.U.I. after note that the rating got almost perfect for this.
2) http://www.webtoons....&episode_no=152
"Don't Try to make me your God. I'm Not your convinience machine that make your Dreams come True".
*procceeds to defeats all the noobs.
"I told you to be gentle..."
Bonus Viole Humor:
http://www.webtoons....&episode_no=137
Installing a Bomb while everyone else is fighting for their lives.