I"ll write about the Banana master we watched in the class.
In that video, a man hold a party and his house was mess, but his parents would come in short time. He had to clean his room, then Bnana master suddenly showed up. The banana master gave him seven points of ways using banana, such as: to use skin banana to clean leaf, to scratch CDs and DVDs with banana skin.
I think the Banana master is his friend originally.
However, the Banana master want people to use banana more efficient because a lot of bananas was wasted every year, especially the skin of banana. Therefore, the Banana master taught him using banana.
