Could you then please elucidate us about it?
It's in the Wiki at the head of this thread, but neither VDB nor IDB were offered at the boarding area:
Dr has BP scanned by GA and is accepted for boarding, along with the rest of pax.
Dr & other pax make their way from the gate to aircraft and is welcomed aboard by FA at door 1L.
Dr and other pax get seated.
Four dead-heading crew turn up after all pax have boarded.
While pax are boarded, incentives are offered up to $800 (United says $1000) but it's not enough to persuade four pax to deplane.
One pax offers to deplane for $1600 and is laughed at by GA.
GA gets computer to pick pax to deplane to make way for crew.
Three pax accept their fate and deplane under protest.
Dr refuses to deplane.
GA sends in "security" to remove him.
After some firm (but not profane or inflammatory) discussion, security tell him he'll be going to jail if he does not voluntarily deplane.
Dr tells security they'll have to drag him out and send him to jail rather than him go of his own accord.
Security pull him out of seat, Dr screams and resists for a few seconds.
Dr sustains two broken teeth, broken nose and concussion apparently after his head hits a seat arm during the extraction.
Security drag the apparently unconscious body down the aisle.
Dr somehow manages to get back on, seemingly in a dazed state, with bloodied face.