How can you tell he's happy? He sort of looks like he's frothing at the mouth in the second one.
This is a famous art print of what might be a cousin to your piggie. At least he looks like a volunteer
http://www.respree.com/cgi-bin/SoftC...S337?E+scstore
As you can see by the set up here, the diving pig really doesn't have a lot of choice if it wants to get off the diving board. The only way off is down
http://members.cox.net/gregwest983/S...pig_syd103.jpg