Sitting head down trying not to cry

I just started a new job and got major school flashbacks. I haven't had a sit down job for a while and we're training atm. So the I am sitting head down for 3 hours trying to listen while everyone jigs their legs around. I desperately need this job so leaving is not an option. How do you guys deal with having to do this and feeling like a complete weirdo because you know they won't understand?