I've never had any jump out of my 10 gallon tank... I have 4 left over from 7 that I bought
At night mine are more active, maybe because the water is colder. I have a HUGE one that I just found is female.. with eggs... and 3 others that are smaller. She likes to flit to the top of the tank along the front glass like she's saying hi to me every time I go to the tank. I also catch her up in my taller plants.. hopefully eating my fish eggs :)
On my first water change after buying them I didn't want to suck them up so I netted them and the second the net left the water they jumped like a farkin cricket and I squeeeeeeeeled like a pig cause it scared the crap out of me. Luckily it landed on the glass hinge top for the aquarium and I just dunked it back into the tank. I also had one land on the carpet and I had to get a flash light and I finally found it and put a net by it and it jumped into the net and i quickly put it back into the tank. It survived for about 2 minutes out of water. I was surprised as all get out..
Now they just stay in the tank and I go slower with my water changes and gravel vacs.