"Apple Plucking Beam." Opening theme to Zan Sayonara Zetsubou Sensei, the third season of the show. The song is performed by Ootsuki Kenji same as the first openings to the other two seasons.
Frequent imagery appearing during the intro include apples, UFOs, and other space-themed motifs. The intro uses signifigantly more color than those of the first two seasons.
Two alternate versions of the intro sequence were done for the Zan Sayonara Zetsubou Sensei Bangaichi OVAs, including a three-minute version which can be downloaded here: http://www.mediafire.com/?dymgv2jnggl