Nicola doesn't realise that she's been rumbled by Donald when he tricks her into taking him for a day on the moors. As she's steeling herself to push him over a cliff edge he blurts out he'll save her the bother! The wheelchair speeds towards the cliff edge but Donald is saved when the chair overturns. Nicola is in shock and she apologises wholeheartedly for her plotting. (thetvdb.com)