UFO Princess Valkyrie season 2. A few of you may have seen this.
Spoiler:
In the very last episode I believe, there is a part where Akino and Hydra have to do their fusion thing again. Akino pulls out the tape, Hydra yells, "Aaahh!!! Too rough!!" and Chorus goes, "Aaah! Schwarzenneger-sensei!!"
That part was beyond hilarious.