He was a total fool, obviously.
He is, though, a young lad and I don't think that he has thought it through at all. Stupid, and yes, misguided. There is no way that he was going to use the knife and he simply didn't have the gumption to understand how carrying it as he did in the current...
Pretty sure it's a wine bottle. You're right about the knife bit, but the kid was clearly just misguided and a bit stupid - I don't think he deserved to be bottled.
I hate to be sharing from the Sun, but bloody Hell, this reaction was a bit excessive...https://www.thesun.co.uk/news/1941294/prankster-dressed-as-killer-clown-gets-hit-with-a-bottle-after-jumping-out-and-scaring-shoppers-in-london/