When you attend an improv show, you kind of know what you’re getting. Audience suggestions will be used. Certain theatre games will be played where one cast member will have to guess what the others are acting out. Sex humor will be prevalent.

But even if certain elements are assured, one of the great things about improv is that because of its inherently spontaneous nature, you can’t truly know what to expect. And The Escapists, the comedy troupe which brought Keep Moving to the Fringe Festival, manages to shake things up even further.

In Keep Moving, you won’t just have “Whose Line Is It, Anyway?”-style routines. The troupe mixes sketch comedy, and even a little song and dance (an amusing, percussive medley of Abba songs, for example, opens the show) into the proceedings.

Some sketches fare better than others. We’re glad to have the group interrupt the action for a commercial for “Gyno-mite” (use your imagination to figure out what it does), and one routine shows us just how funny an obsessive, self-righteous librarian can be. But another scene, which centers around an alcoholic mother at an AA meeting, completely falls flat.

The improv section of the show is much more consistent. This is an excellent ensemble of performers who play well off each other, even if a number here or there occasionally drags on too long. Particularly adept are Brian Giles, who made a memorable preacher forced to sermonize about a magnificent, ovulating unicorn, and Ariel Francouer, who stole the show when she represented “lust” during the group’s “Symphony of Emotions” gag.

If you’re intrigued by a show that crams in Broadway musicals set in IHOPs, trips to Egyptian pyramids and sharp-shooting gynecologists (and really, you should be), catch the final performance of Keep Moving on Sunday at 2 p.m. The show plays at Warehouse Next Door. Tickets are available here