Set my hopes up way too high

Ned's not sure what he's let himself in for; although his vertigo is less than it was, due mainly to his current job which often involves being off floor level, he's still not entirely confident at height. So he's not sure why he volunteered to take part in the International Man of Mystery abseil in aid of the Stroke Association down Fort Dunlop in three weeks time. The thing is that he needs to raise £75 in donations before the big day so, as they used to say on Blue Peter (and might still do for all I know), that's where you come in. Any donations to enable him to scare the living daylights (d'you see what I did there?) out of himself will be very gratefully received.