Altitude problems - Telegraph Nik Wallenda has walked across a wire 1,500ft above the Little Colorado, which flows into the Grand Canyon. Television viewers were gripped by his 22-minute feat: he looked very small and wind-buffeted. A microphone picked up his prayers. But his elk-skin pumps did not slip. "Obviously there is still risk in what I do," he remarked modestly. Another daredevil, Wayne Mallon, a Bath window-cleaner, became a YouTube hit after a passer-by filmed him edging along a third-floor ledge with no safety harness. Magistrates ordered him to pay £2,000 for health and safety breaches. An important difference with him is that, had he fallen, it might have been on someone below. Few like unexpected window-cleaners to fall on them, with or without bucket. But how likely would that be? With risk - climbing ladders, walking tightropes, flying - attitude, not altitude, is all.