Could be. What would happen is this: I would slide the tank out from the shelf.. she would hurriedly snake-out her head from the substrate, and strike. It happened a few times, and I used a snake-hook-type object (okay, it was a hooked deer antler. I am a bit backwoods, but it works!) to try to let her know that it was not a feeding time.. she got really upset and actually flailed around when I did pick her up with the hook and had her in my hands.

Now, in the tub, she just sits there and lets me pick her up.