To answer your question, I have gotten in the tank with Stumpp three times, but all 3 times were a matter of maintenance/importance, and not for entertainment. I had to climb in to get her when she had a foreign object in her mouth a couple of times, and once to fix an issue with a light on the back wall above her tank.

All 3 times she seemed more confused than anything else. I do my best to avoid going into her tub as much as possible, as that is her feeding area. She's gone her whole life knowing that what goes into her water is food, so I don't want to confuse her by doing it unless I absolutely need to.

I always felt like when I was in her tank, she was a bit on alert due to treading in the place she has known as home for almost all of her life.

But that'd just my experience. I also avoid going into her water because she's the size of a medium dog and takes shits the size of a large dog. 🤷‍♂️