Joanna,

It's kinda like that rush of adrenaline you get when you have a near miss with another car (like when someone's changing lanes and you're in their blind spot and you have to avoid them hitting you). My heart started racing when I couldn't find him in his enclosure.

Little brat was sitting (ok, maybe not sitting, but laying) there watching this silly human flush red, then strait to white whilst looking for him. I'm sure he was going "look at that pretty blushing on my human! Wonder if the blushing will stay or fade as time passes?"