Celtics fans were loving McLovin and Bailey Zappe interacting courtside during Game 5

As Celtics fans were reveling in a 22-point lead in Game 5 Thursday night with 10 minutes to go, they got another fun surprise. The TNT cameras panned courtside to Christopher Mintz-Plasse, aka “Superbad”‘s Fogell/McLovin, exchanging a handshake with none other than Patriots quarterback Bailey Zappe.

Boston fans seemed to appreciate the cameo — and unexpected duo — on Twitter. Earlier in the game, Mintz-Plasse pumped up the TD Garden crowd on the jumbotron.

Mintz-Plasse was sitting with his fiancée Britt Bowman, and Zappe with his fiancée Hannah Lewis (Zappe announced his engagement to Lewis on Instagram earlier this week).

Zappe shared a photo of the celebrity duo on his Instagram story, with Mintz-Plasse then sharing it as well.

For those in the know, despite his L.A. roots, Mintz-Plasse is actually a lifelong Boston sports fan, as his dad was born in Worcester and raised in Webster. He described his allegiances to Celtics team reporter Amanda Plugard when he was in town for Game 1 of the Celtics-Hawks series:

During that game, he caught up with another Boston athlete, sharing photos with Red Sox great Dustin Pedroia on Instagram — as well as highlighting Bowman’s engagement ring on the jumbotron.

View this post on Instagram

A post shared by @mintzplasse

Celtics fans are certainly hoping Mintz-Plasse has another reason to come back to Boston, for a Game 7 Monday night.