To draw a straight line without a ruler you need to use a constrained ball – a little device put at the tip of a pen or a pencil. It also measures the length of the line.
More pics here.
“A Florida chef unleashes his outrage in the kitchen — just moments after he learns he’s been fired! Shocking public record security camera footage shows how he stormed into the kitchen with a keyboard in hand and smashed it against a wall in front of staff. Stunned workers backed away as he hurled insults at them and flung plates filled with food to the floor. He even throws a hot pan off the grill, then showers the room with a bag of flour. Incredibly, things come to a halt when an unidentified man rushes in and knocks the disgruntled chef to the ground in one punch.”