It's already been brought up, but that's not a 'vertical leap'.
It's also not particularly impressive (although there's plenty that GSP does that is). I was able to clear cyclone fences with a leap by the time I was 20 or so (haven't tried it in a few years and my plyo training has lapsed a bit, but I like to think I could still pull it off
). Penn jumping out of the water is a much bigger feat, not that GSP was attempting to one up him here.