I walked out because 1) I'm 24 later this month and he's like 11. I'm not about to get further into a debate about shounen anime/manga with a kid more than ten years younger than me.
2) This same kid, in order to see how 'cool' I was, asked me if I had ever seen the following series: Naruto Shippuden, Bleach, Full Metal Alchemist, and Street Fighter II V. Made a statement along the lines of: Mortal Kombat was a movie, next they made a second movie, and then made a game for it. And has never heard of anything as recent as from within the past year.
It wasn't worth the effort after hearing such statements.