It is best not to demonstrate the sliding in this piece until all the notes are learnt. This spares you having to listen to them slide around when they should be paying attention. The second half proves quite challenging, and I like to emphasise the piano quality, creating the illusion of a space walk, light and floaty. The following slides should be harmonic slides to encourage stress-free movement of the left hand. It also makes for a nicer and quieter sound, so fewer confused faces in the audience. Once all is learnt I ask them to slide up and down during the introduction as loudly as they can, stopping abruptly when the ostinato begins. This I describe as the sound of the space rocket landing on Mars.
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