This is the shocking moment a man was kicked with such force, he was sent through a top deck window of a moving bus in London.
The man was hit so violently in the midriff that he went through a pane of glass and fell into the road near Finsbury Park, North London.
CCTV footage of the attack, which happened just after 2pm on December 27, 2012, was taken from a camera on a 254 bus that was travelling along Seven Sisters Road directly behind the double-decker the man fell from.
The footage was shown in a BBC programme, 'The Route Masters: Running London's Roads', which was broadcast on Sunday night. The programme charted how police investigate crimes on London's vast network of bus routes.
The victim's sister, named on the programme as Gillian, told the BBC that her brother's back was broken in the fall and he was "paralysed", while the programme makers described his injuries as "severe".
She said: "I'm still finding it hard to believe that someone's actually injured my brother in this way."
Detective Constable Tony Barun, a specialist safer transport command officer for the Met, told the programme: "It's still shocking. Although we see violence every day, it's our bread and butter, it's still shocking to see something as graphic and violent as this.
"We know these window can be kicked out with a great deal of effort, but to see someone kicked so hard that he actually goes through the window and it pops the window out of its frame - I've never seen that before."