As an update to this thread I thought I'd give a status report. All those souls that suggested his behavior was because of breeding...I think you may have been right.

I took him out the other night and placed him next to a big normal girl for some comparison shots. After about ten minutes, I picked him up to put him back in his enclosure and he started his thrashing. It wasn't to the level it was the night of my initial post, but darn tootin it was the same deal.

I'd taken him out several times to check on him periodically since my initial post and he was fine. Although after sitting in the tub with a female for a while it appears he wasn't keen on going home alone.

Thanks for all your input everyone, quite helpful in figuring this one out.