I remember a funny story. It was back in the mid 80's when I was in the Army. I got to my permanent party station in Ft. Lewis Wa. I and a couple of friends one of which was Brian Berscheid (I hope I spelled it right Brian) decided that we had too much free time on our hands, so one summer we went to get our PADI open water certification.
We generally would get together on Saturdays and go into the Puget Sound where the water is 48 degrees even on the hottest days.
The instructor would get us on the bottom in a circle, there were maybe 16 of us in the group. Brian was next to me and we were directly across from the instructor who was writing on a white board and showing it to all of the class and we signaled we understood.
I looked down and saw an orange 100 legged starfish slowly climbing up Brian's leg so I elbowed the guy to my left and signaled for him to look and we both were laughing about it. Water was seeping into my mask and going up my nose and I was having a hard time breathing because I couldn't maintain the seal on my mouthpiece.
Slowly everyone in the circle was involved though pointing or just looking around and seeing what was going on. Eventually everyone was laughing and swallowing water, I could hear everyone laughing and trying to clear their masks. The instructor finally noticed and stopped and was looking at Brian. Which made him realize something was up. You have to realize we were wearing scuba suits made of neoprene and you wouldn't feel a 100 legged star climbing up your leg.
Brian looked around and I don't know if everyone was holding their breath to see how he would react to a 3 foot wide orange 100 legged starfish halfway up his body, but he looked down, screamed, lost his air and shot to the surface! About 8 feet up the starfish dropped off and drifted slowly to the seabed (because it didn't want to go to the surface) and casually walked on. The instructor wrote on the board "Stay Here" and went up to get him so he wouldn't get the "Bends".
We were all trying to calm down and stop laughing but it never happened that day. Brian came back down and we would get control till we looked at him again and someone would start laughing and we would all lose it. I must have swallowed a gallon of seawater and I was plenty sick from it but thinking about it always makes me laugh.