There is a line in front of you that you cannot jump over; how do you make it shorter without touching it?

What can you hold in your right hand but never in your left? Solve the riddle → A man fell from a 30-meter-tall building but wasn't hurt; how is this possible? Solve the riddle → A man walks along a pitch-black country road, dressed entirely in black, with no streetlights, and a black car without headlights drives towards him; how does the car avoid hitting the man? Solve the riddle → A woman has a brother, but her brother has no brother; how can this be true? Solve the riddle → A doctor gives you three pills and instructs you to take one every thirty minutes; how long will it take before you have taken them all? Solve the riddle →