YMMV on tastes in humor, but once in a while the duo do find a joke that works.
In Epic movie when Edward drinks from the "Chocolate River"
"AAAAAHH! TALKING BEAVER!" *kicks* Funnier the second time when Lucy already met Mr. Beaver
The Head On parody from Disaster Movie, possibly the only remotely funny joke in the movie.
The "Running with glass slippers" would be on here... if it didn't come after a scene which we see the princess eating glass.
The gag about how blatantly obvious the councilman is the traitor, as well as joking about how many movies have villains who are trustworthy to the cast but blatantly obvious to the audience.
The Superman Returns gag in Epic Movie, where, instead of deflecting a bullet with his eye, it goes in with an appropriate squishy noise, followed by shrieks of agony.
"Oh my God you shot me in the f**king eye! That really hurt! Why would you do that?! It was so unnecessary!"