Unfortunately this is a fact of life with any mode of rapid transportation, there will be accidents with some degree of frequency and intentional harm caused by the criminally orientated and the mentally unwell. The story is nothing that you would not find in the average newspaper and is a text only narrative of events. Unfortunely this (likely insane) woman would have found some other method to inflict this on the poor child (autobahn bridge, river etc.) Without trivializing anything, the child was very lucky to escape this with lower extremity amputation only from his encounter with the train. The psychological trauma will be the bigger problem. Bear a thought for the bystanders, driver an first responders also.....