I've left a soda can with a loaded bang mechanism glued to the underside of it on the front counter at work & told him to pick it up. I've done the same thing with a toy bomb (looks very similar to the one in the picture). I've squirted him with a toy that looks like the "Dutch Boy" (paint) & when you pull it's pants down it "pees" on you, then I forgot to put it away & that particular UPS guy squirted me with it on more than one occasion. I've thought about loading the store entrance itself with a few loaded bang mechanism or stringing up fake spiders tied to invisible thread from head-height down to about knee level so he can't just duck beneath them. I've also considered sprinkling the counter that he puts the packages on with our best fake cockroaches or maybe performing a simple magic trick (he doesn't know that I've learned one or two & if/when he asks, I deny it) & then performing either a "steal" or planting something in his pocket so he either walks out with an item he did not walk in with or walks out with one LESS item than he walked in with. Point is, there are plenty of naughty things I could do but, I think, maybe just one time, I'd like to do something a little less malicious & a little more sweet to him. I'm not sure how to go about this, & I'd appreciate any help offered. All suggestions are welcome!