The act of placing a napkin under the lid of a salt shaker, screwing the cap on, and tearing the edges off so it looks like a regular saltshaker, and watching people try to get salt with no success..
similar to cock-blocking but with salt, not cock.
Guy 1- Dude don't get salt out of the saltshaker on the left side of the aisle.
Guy 2- Why?
Guy 1- We are salt-blocking the entire lunch line.
Guy 2- Damn thats awesome, lets watch.