I agree with others that the sentence was rather harsh, as the charge being, 'committing violent disorder'.
I would have thought the charge would have been 'committing an act likely to endanger life'.This then may have attracted such a long sentence, but 'committing violent disorder'???
There are hundreds of youngsters committing violent disorder every weekend, and get away scot free.
Yes I know his action could have killed someone, but it didn't.
Take the following analogys,
A car is being chased by the police down the road and the car mounts the pavement and pedestrians have to leap out of the way to avoid being killed.
Now, someone could have been killed but weren't, so would the driver be given a 2 years 8 months jail sentence? I very much doubt it.
A gang of youths gather on a motorway bridge, one of them hurls a large object onto the carriageway, now it could have killed someone but it didn't.
Would he have also been given a 2 years 8 months jail sentence? Once again I doubt it.