I'm not sure if they are jumpers, but they certainly dart around very fast, so if he got spooked at night, and darted out, I can see how he could have jumped out.
They are a very cool fish. The blue spots are a nicely colored blue, and they have tons of personality. They actually turn their heads to *look* at you.
I definitely want another one, but I just don't see them very often at the LFS around here.