blahpers |
The surprise round is independent of disabling the trap. It may even be possible to disable the trap but not realize that it's a creature; in that case, the hapless character would still be caught unawares by an attack from the ooze. The deathtrap ooze's stat block describes how to tell if a trap is a deathtrap ooze; failing that, I'd call the party surprised if the ooze attacks.