Baby doll injury at childbirth class

So Jesse and I went to childbirth class last night. It was not too painful and pretty informative. I did think however that we were going to get thrown out at the end. We were all sitting on the floor with our labor coaches (about 10 couples) getting ready to start our relaxation breathing. First of all the one teacher could not get the lights dimmed how she wanted, they were on off on off on off. (not relaxing) Then, once we were underway, I was watching the other teacher put some things away including a baby doll with its head inside a fake pelvis. As she was moving it the head fell out of the pelvis and landed with a thud on the table. I could NOT stop laughing, with everyone being so quiet with the crazy forest music in the background the laughing only got worse, then I could feel Jesse laughing behind me which made me have to bury my head in the blanket. Everyone was looking at us and I thought we were going to get in trouble. We are bad students! Actually the giggles originally started when we were passing around babies at different stages of development. They were rubbery and Jesse wanted to ask the guy next to him to "pass him the eraser". As a side note, the last time Jesse and I had a class together he got kicked out for talking to me. This should be an interesting 4 weeks.