Three (not two, not one) masked men (not casual bypassers), in broad daylight (not at night, or in the gloom of dusk, electric lights notwithstanding) , grab a humungous brick of gold from an exhibit.
And the attendant noticed their "footsteps"??
Gee, i guess they would have got away totally clean if they'd just worn their socks.
Maybe some of those rubber sole tabi-boots, and a ninja outfit, nobody would have been the wiser.
attendant :"What are you doing with that huge chunk of gold exibit?"
robbers; "oh, were taking it for, ah......cleaning????'
attendant; "Oh, ok. Here's some money for some tarn-off, have a nice day. Why are you wearing ninja suits?"
robbers;" Becauuuuse......because......ahhh.....black absorbs light rays that make tarnish, so we........dont have to reclean it while we bring it back?? Yes, thats it!! Reduces tarnish!"
attendant; "Oh, how thoughtfull."
robbers; *phew*