You'd be amazed how many people i have to painfully watch trying to pump magliner tyres up with an air line next to my bench at work.
It's like you've just given them 3 minutes to solve a Rubik's Cube.
I don't say anything anymore, other than "No more than 30 pounds pressure"
The amount of times me and anyone nearby has nearly shat their pants because they don't understand leaking air doesn't count when checking the pressure and holding the lever full on is woeful.
The noise of an exploding tyre when you're not expecting it can certainly rattle you, especially when i'm on the phone minding my own business, but seeing them laying on the floor in shocked silent state gives me a warming chuckle followed by "I did tell you."
Always a last minute thing too, as they're leaving the building and it's the final ite
m to go on the truck before heading off.