Neil Young was joined by Jimmy Fallon on The Tonight Show for a rendition of the classic rocker's tune "Old Man."

Fallon was dressed as Young and doing his spot on vocal impersonation, which made for a surreal sight.

"With Young as a direct comparison, Fallon's impersonation was even more impressive," wrote the Wrap of the pairing.

Young also performed his recent single "Who's Gonna Stand Up?" from his album Storytone.

Fallon has used his Young impersonation to give folk renditions of popular songs, such as Iggy Azalea's "Fancy," and Willow Smith's "Whip My Hair."

"I saw you doing me before and I always thought it was fun," Young told Fallon.