'The Flash' Name Drops The Incredible Hulk In "Girls Night Out"

The Flash dropped plenty of pop culture references in its latest episode - including a pretty big Marvel Comics one.

Spoilers for tonight's episode of The Flash, 'Girls Night Out', below.

Tonight's episode followed the unpredictable bachelor and bachelorette parties of Barry Allen (Grant Gustin) and Iris West (Candice Patton). Iris' dinner was quickly derailed by the arrival of an evil henchmen, provoking Caitlin Snow (Danielle Panabaker) to turn into her Killer Frost persona.

Killer Frost later explained the situation to the rest of the girls, revealing that she awakens whenever Caitlin is asleep. This caused Felicity Smoak (Emily Bett Rickards) to remark "Ooh! You're like The Incredible Hulk!"

This actually isn't the first time that Caitlin has been compared to the Marvel Comics favorite, with her previously saying a version of the Hulk's catchphrase in the show's season three premiere. But with Hulk appearing on the big screen this weekend in Thor: Ragnarok, there's a little bit of kismet with this newest Easter egg. (Especially because Hulk is called a version of the "The Incredible" title within Ragnarok.)

Marvel references have become a bit of a recurring thing for the Arrowverse shows over the years. Some have been a bit subtle, such as Thea Queen/Speedy's (Willa Holland) remark that she's seen a movie involving "a bunch of superheroes in a farm house." While other have been more overt, such as the "Earth's mightiest heroes" mentioned in last year's crossover.

The Flash airs Tuesdays at 8/7c on The CW.