It doesn't really matter what the outcome was. The action of throwing any objects onto a railway with intent to endanger passengers is an offence in its own right that carries a maximum sentence of life imprisonment.
... as is wilfully obstructing the railway.
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With respect, this is why we don't let victims of crime decide on guilt or punishment. A justice system cannot be run on emotive judgement.
Indeed, there are sentencing guidelines for nearly everything in order to standardise punishments.