Zverev elaborated: "What happens now with the tennis balls is that the air and the pressure leaves the tennis ball because of ...

This week, we tackle the infamous hack that claims you can actually unlock a car door by using the air pressure from squeezing a slightly modified tennis ball against the key hole. Will it work?

What are tennis balls made of? Modern tennis balls are made of a hollow rubber core, covered in a wool or nylon shell which is known as the nap. Pressurised air inside the rubber core makes the ball ...

the pump mechanism came in the form of a yellow tennis ball. The brand claims the pumped-air system from the ‘90s offers stability and fills the hexagonal-shaped lug pattern—all part of the ...