- Go shopping with your girlfriend/female friend/housemate/relative.
- Go to the fruit aisle and get her to choose a juicy plump watermelon and stuff it up her top. Now she looks pregnant.
- As soon as you cleared the checkout, give her a congratulatory slap on the back, sending her flying to the floor.
- The look on the cashier’s face as watermelon innards spurt out from under your lady companion = priceless.
- Deal with the swarm of concerned customers, staff and security officers.
- Go home and have a good laugh about it.