I don't get it. Why would you laugh at your family/friends when they're puking? What makes it funny? I think it's crap.
I also think it’s crap to laugh at their friends and family when someone is sick. I think the reason why they do that is because they wanna see how much puke comes out of their stomachs. People are certainly interested in when their friend/family member pukes and it comes out like a geyser.