How did the three stars keep a (mostly) straight face throughout this bit?

Matt Damon, Ben Affleck, and Jimmy Fallon named all 351 cities and towns in Massachusetts on "The Tonight Show Starring Jimmy Fallon" in a five-minute skit.

Some big names in Hollywood, and in Massachusetts, have teamed up in a new skit to pay homage to every inch of the Bay State. On Tuesday’s episode of “The Tonight Show,” guests Ben Affleck and Matt ...

A majority of respondents said their hometown passed the test — but Quincy (and a few other classics) sparked loud debate. The post Readers judge Matt Damon, Ben Affleck, and Jimmy Fallon’s Mass. town ...

Matt Damon and Ben Affleck went on "The Tonight Show" on Tuesday, and while they were there, they teamed up with host Jimmy Fallon on a segment where they pronounced every city and town in ...