system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] What kind of pranks do teams like the Avengers and the X-Men play on each other?

I imagine Spiderman webbing up door handles and Iceman freezing the Jean Grey school hallways.
gpt
* The classic "Mjolnir on a toilet seat" bit.

*  Assuming there's a statue of a dead professor, enlarging its head.  Massively.

* Similarly to the above, shrinking the X-Jet.

* Random mid-afternoon downpour on campus.

* Danger Room auto-locks and instead of generating holographic enemies it blasts Caramelldansen at full volume, not freeing them until the entire team does it (or vocally admits that the Avengers are the better team and that Iron Man is the best).

* Cerebro gets tuned to amplify more...base thoughts.  Similarly to the above, users can't shut down the system until they find a woman fantasizing about Tony Stark.

* Professor for home economics is out for the week and replaced with Vision.