Last night on "The Tonight Show," the audience got a blast from the not-so-distant past, as Jay Leno took the stage for a surprise monologue. 

Host Jimmy Fallon welcomed Leno, who is promoting a new CNBC show "Jay Leno's Garage," by telling the audience that that he'd pulled a muscle mid-joke and needed a sub to come in. 

"Could somebody tag in for me, please?" Fallon asked, as Leno ran onto the stage to big applause and delivered some of his signature one-liners. 

Watch Leno, who hosted his final "Tonight Show" on Feb. 6, 2014, get in a few jokes about the 2016 race, ObamaCare, Usama bin Laden and more in the clip above. 

The monologue culminated with Fallon and Leno teaming up for a hilarious "The economy is so bad" bit. 

Rihanna: Rachel Dolezal Is 'A Bit of a Hero'

Man Survives Bear Attack by Doing the Last Thing You'd Ever Think Of

Watch Carly Fiorina Sing a Song About Her Dog, Snickers, with Fallon

WATCH: Jay Leno Mocks Jimmy Fallon in Hilarious 'Tonight Show' Return