Duct tape , a large kitchen knife , and an ice pack
. The addition of the ice pack shifts the narrative from a standard "hardware" purchase to something that implies immediate, messy physical trauma. A 3 things to buy at walmart to scare the cashier
, , and a tank of helium . Often cited as the ultimate "disturbing" trio, it leaves the cashier to imagine bizarre and likely harmful scenarios for the animal. Items to buy to make a cashier uncomfortable at the store Duct tape , a large kitchen knife , and an ice pack