Unexpected vandalism
Whilst an adolescent TitanLX, a day of the school summer holidays was spent cycling round the local area with a mate (whom we shall name Simon, for that was the identifier his parents gave him), looking for something to do.
Being of an easily swayable persuasion, Simon convinced me that we should drop something off the railway bridge onto a train. There were some traffic cones nearby but as they would be too difficult to cycle to the bridge with, they did have a bag of sand in the base of them to stop them being blown over so these were removed. (mild vandalism)
We positioned ourselves on the bridge each holding a sausage shaped bag of sand and as a coal train passed under the bridge we threw the sandbags onto its roof. Simons’ splodged onto the roof and much childish chuckling was had. Mine however landed on the roof air vent and proceeded to split and fall into the fan causing a plume of sand to puff out of the top of the train.
So depending on the below, the result of this post is either a win, average for 1st posts, or Kerry Katona
1. Sand did nothing to the internal workings of the engine
2. Sand caused the fan to fail at some point and did minor damage
3. Sand got into the engine and it ground to a halt on the main line / exploded like a Hollywood blockbuster, required recovery, massively inconvenienced all concerned, and a full engine rebuild was required at a cost of thousands.

Length? At least 150 yards long for the train.
(TitanLX, Fri 8 Oct 2010, 12:54, Reply)