from up there he can monitor the store

Spray it with a CO2 fire extinguisher until it gets all chilly. Then you can pick it up, put it outside and let it go on its merry way as soon as it warms up.

I've seen bodega cats, and lounge lizards, but this is the first bodega lizard that I have ever seen.

Take your dog to work day got out of hand

YouTube is awash with videos of monitor lizards and King Cobras just absolutely wrecking each other. I'm not sure I know of more epic nemeses in nature. Their fights wind up looking like actual Kaiju battles. Also because they are both disturbingly large animals.