Jasper wondered if it was some sort of trap. ‘What is Memory Modification anyway? And who are you? I’ve never seen you before.’ Mr Z looked at Jasper over his sunnies. ‘Not that you remember,’ he said. Jasper stared at him. ‘The Golagster told me you were well set with your Mental Manipulations stuff. So I said we should see if you could handle some Memory Modification. This class is, like, super-duper Mental Manip. Plus, ’cos you were done by a Scrambler, you should be right on the money, ’cos Scramblers get into people’s heads, yeah? You in?’ So Saffy was right. Cool. Jasper found himself grinning. ‘All right!’ ‘Right on, man.’ Mr Z nodded his approval. He plucked a few notes on his guitar. ‘Try whistling me a tune.’ Jasper tried to think of a tune but his mind was blank. ‘I can’t think of anything,’ said Jasper. Mr Z peered at Jasper over the top of his sunglasses. He played a little ditty on his guitar. While Mr Z played, the theme from Sesame Street popped into Jasper’s head.