You must have been watching the training diaries part 2.
I think that Ben just made this up as a joke, because the sail did not show up after crashing. (Eraser = Radiergummi)
Ben must have been enjoying seeing such topics starting up, let's see how many new toys he will identify in the next diaries.
~Shinobi
I'm in WA and quite often one of the severne boys will rock up at the beach with new protos. Have not seen an "eraser" at the beach, so maybe a bit of a joke as suggested. I have seen one interesting new toy that maybe in development though, and it's not a sail.
In the interests of self preservation I'm going to stop there...
