Kick

You've decided to go with a tried and true method, the kick.

"Yes actually," you say as you walk towards him, "I want to take a look at the buttons to see if I can fix this thing."

"Good luck, the buttons aren't dumba-" he suddenly cuts off as the top of your foot meets his balls. His jeans cushioned part of the blow but your wedges are pretty hard and you got both of his balls.

"Unnnggghhh," he moans as he hunches over while holding his balls.

"That's what you get for pissing me off asshole!" You yell as you look for your next target.