You’re at the crag. You’re tied in. You’re ready to climb. At that very moment, your belayer’s breakfast burrito comes back with a vengeance. He runs off to take care of business (using LNT practices, of course). Across the crag, a lone climber spots you. He sprints at full speed, brandishing a belay device, and yelling, “Need a belay?” You do, but should you let this random person belay you?