"Right here, right now? Holy s--t!" Leto said nervously. "Since the Oscars I've been growing this," he said of his scruff. "I'm very attached to it."
Midway through the trim, Fallon switched blades. "How's that right there?" the comedian asked. "You trim my bush really good," Jared joked when Fallon was done.
Check out the hilarious clip above!
The 30 Seconds to Mars rocker also had an "intense staredown" with Fallon while sitting near a mountaintop. "I have achieved full and complete balance. My heart beats once per minute. My body is an arid tundra," Fallon said during his meditation.