Jumping spider
They often hunt high up in bushes, or on vertical walls. To save themselves from falling they do something very much like what climbers do to protect themselves in the mountains. Humans tie a rope to the mountain and attach the other end to the harness they wear. Jumping spiders attach silk from their spinnerets to the thing on which they are standing and then they jump. While they are moving through the air they make silk so that there is always a safety rope trailing out behind them.