Another escalator related no-no on the underground that can cause all manner of chaos is the release of unsecured luggage onto an upwardly mobile escalator. Should a hand lose its grip on heavy baggage, the series of following events take place. Someone is guaranteed to shout Woah! or Hey! or perhaps even Oh dear me this is not going to end well for someone. Subsequently, the occurrence will take one of two forks in the road. Either some master in the speed of the Ninja will move with lighting swiftness to grapple the luggage into a brace position, thus stopping the moment dead. If such a Ninja fails to appear, the case will then bounce its merry way down the rising stairs, taking out everyone in its path like pins in a bowling alley. While the images of this can cause hilarity in the right hands mainly those of Channel Fours comedy department the end result is broken limbs, fractured skulls and splintered elbows. Also someone is likely to break a nail. Best to keep hold of your belongings at all times.