A couple of months ago I experimented with chevrons as a way to transition from the current slide to the next. Instead of just having a graphic slide across the screen in some fashion, I wanted to try something a little different. So, the chevrons actually pick up screen segments and move them off-screen, or they drop segments to build the next slide. So, it’s a bit of a different effect than what you might normally expect to see.
http://fenimorephotovideos.com/psp_transitions1.html#Chevron