is it natural that my ball python keep on trying to escape?

[redshepherd]

I have one ball python that does this, not sure why. I thought maybe she was underfed at first but now she is super fat and still tries to escape. She is in an ARS rack, an ARS-8018 tub with coconut husk substrate, 80F room temp, 88F hot spot, basically perfect conditions. All my other snakes are happy as can be and still she keeps trying to crawl through the window in the front of the tub. I'm starting to think that some snakes are just runners.

This person clearly might not have correct temps though, not using the right equipment to measure it, so this isn't the reason.