When Santiago is talking to Holt about continuing to mentor her, it's revealed that she wears her watch just like he does, showing that she learned it from his mentoring.
Jake and Charles try to take down a man named Dom who leads a group of street bike racers. A clear reference to the "Fast & Furious" movies about a group of car racers led by a man named Dom.
While riding a bike Jake attempts to make a jump and crashes, much like his character in the movie Hot Rod (2007) often does.
Dale Pavinski plays "Dom", an obvious reference to Vin Diesel's character in The Fast & Furious franchise. He also played a character named "Vin" on another Fast parody movie, Superfast! (2015).
Jake yells "kee-yaw" in a flashback, a phrase used several times in the the song "The Karate Guy" by Andy Samberg's group, The Lonely Island.