Is lurking legal?

One example is Widow Twankey in the British pantomime version of the Aladdin story. In Monty Python's Flying Circus (Episode 30) non-British viewers were puzzled by the nature-film sequence in which the Pantomime Princess Margaret, lurking in the undergrowth harpooned a silver breakfast tray that was scuttling down the woodland trail: "The unsuspecting breakfast glides ever closer to its doom..."