Originally Posted by martinori

Yeah, going to get a new chain anyway. I'm also going to ask my local bike shop where I bought the bike for advice as well.

I'm just worried if something else could go wrong that caused this. This is actually very dangerous if happening while riding, guess I'm lucky it happened when I tighten the pedals. I worry if something is wrong with the bike, this could happen again.

Something like bike setting, shifting, cassettes or chainring. Could some other parts of the bike potentially cause something like this?

I read in some other online posts that mentioned bent cassette teeth. I never crash my bike on the cassettes side, but still would like to know if anyone has any experience in this area.