so you are saying that after you opened the hatch, to motor lowered itself into the "closed position" while the hatch was still up?
they do this sometimes, happened to me a couple times
You need to get a screwdriver and put it into the motors pulldown claw, like how the hatches bar would be sitting in it, and fiddle with it while you turn the key. there is a little lever in there somewhere that the hatch bar would be touching and you need to push it down with the screwdriver so the latch thinks the hatch is down. Then it will open up back up.
I think i lost myself typing this, its a little hard to explain, but its a common issue. You just have to remember to hold the hatch down while you are closing it until you are sure the latch has closed around the bar on the hatch
________
FIX PS3