Hold the egg in your left hand, and pierce the egg with thumb tack held in your right hand. You can turn it too so it kind of screws in. Don’t worry, the egg won’t break.
He seemed to make a point about piercing the egg at the fat end. (pardon the pun).
I remember reading once that the design of a common chicken egg is so perfect that you could press down on one with your thumb and index finger, with all your strength, and nor be able to break it by doing so. Thumb at one end, index finger at the other.
Who wants to try?