I’m feeling sick – coming through
Working your way through a crowd can be difficult. I have been to concerts with tens of thousands of people and working your way to do anything even remotely human, like purchasing a hotdog can take ten years. If you want to avoid this, just yell I am going to throw up.
This, according to the poster of this, should get folks out of your way. I could only imagine that it would work if you were to do it and people could hear you. Nobody wants to be next to the guy who got sick, that spoils all the fun.