Yes, I would not like to take a hit from Mr. Asper. That snake has serious knock down power. He hit a mouse and it just doesen't go anywhere, just lays there twitching for a few seconds. Takes my Bitis a hell of a lot longer to get the same results.
I was lucky in a sense but I never enter a cage with any part of my body unless I can see where the beastie is, even then I will remove it before working inside.
There is a ledge above & below the sliding glass door. It is a BIGTIME problem that not everyone is aware of, this is why I took the picture and posted it. I personally know a Rattlesnake researcher at ASU that was tagged when he grabbed the bottom lip and did not see the juv. Atrox hiding there.
I stuff the recesses with foam and remove the hiding place when I get it ready for habitation. In this case I did the bottom, added the substrate then forgot to do the top. This picture is look straight up with the camera ,just even with the tracts for the glass.
Here's a nornal picture of the him.

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The more people I meet...the better I like my venomous snakes.