Seems to have all come from an incident where another passenger has rammed their trolly into the elderly lady in the video, her son has gone berserk and eventually assaulted the other passenger. Police have come in, by some accounts they have tried to restrain the mother who has a black eye because of it and from then on all hell has broken loose. There's coppers with broken noses and people getting kicked in the head with steel toe boots while face down on the ground. We know there are fucking mentalists out there, but that's the whole point of the force being trained enough to deal with the situation. Wherever violent individuals are involved there is the threat of injury, there are restraining techniques (including the taser) but booting someone in the head is insane and *could* cause life threatening injuries.