The final image of Saddam Hussein was on jerky unedited footage filmed by an anonymous onlooker standing at the foot of the steps beneath the gallows. The video showed the noose around his neck as he recited the shahada, or last testimony. Before he could finish, he dropped through the floor to the sound of the trapdoor crashing open. After a few seconds of confusion the footage ended with a close-up of the dictator’s twisted head.

None of the images was part of the “official” footage filmed from the top of the gallows, which was aired on Iraqi state television and beamed around the world. In Iraq the other footage, which was filmed on a mobile phone, was being swapped on handsets for 20p and soon spread around the world on the internet.

At the height of his power Saddam had always had himself filmed in military uniform with shiny epaulets or standing on a balcony firing a gun — an image that would play again and again on state television in homage to his self-declared greatness. Just before sunrise on Saturday, a witness to the former Iraqi President’s death filmed his ignonimous end using the phone. Hours later the grainy, darkly lit footage was on the internet.

In a former military intelligence building, now an Iraqi prison, Saddam was sandwiched between two stout men in black hoods who guided him to the gallows. He bundled himself in a dark overcoat to warm himself in the December cold in Baghdad and stood on an elevated platform with its rusty metal bars. Beneath the coat was the white shirt and black blazer and trousers that he had worn throughout his trial on charges of crimes against humanity.

The two hangmen lifted the thick hemp noose over his neck and Saddam stood passively, his piercing brown eyes indicating a flicker of fear.

“Ya Allah [Oh God],” he said. The room’s 15 witnesses roared back: “Peace to be upon Muhammad and his followers. Peace be upon Muhammad and his followers.” Their voices rose in glee and some added a rallying cry belonging to the followers of the radical cleric Moqtada al-Sadr, whose militia movement has helped to fuel Baghdad’s current sectarian bloodletting. “And quicken his [the Mahdi’s] appearing and curse on his enemy,” and then one zealous spectator shouted: “And support his son Moqtada Moqtada Moqtada.”

Ignoring the baying crowd, Saddam, whose dyed black hair was askew, pretended that he misheard the young cleric’s name, whose movement in its violence is reminiscent of Saddam’s own ruthless Baathist cells that paved his way to power. Saddam smirked at his tormentors.

A voice shouted back: “Long live Muhammad Baqir al-Sadr”, the name of the ayatollah who helped to found the Prime Minister Nouri al-Maliki’s Dawa party and was murdered by Saddam in 1980.

“To Hell,” another spectator bellowed. The scene had begun to resemble a medieval execution or a wild hanging in Texas. “Please stop, the man is being executed, please stop,” one witness shouted over the clamour. Saddam peered down at the mob and then recited the shahada. His skin was wrinkled; he looked tired and knew the end was near.

“God is great and Muhammad is His prophet,” he said and started to repeat the phrase intended to ensure one dies a good Muslim and goes to paradise. But the trapdoor opened and his body plummeted. His neck snapped.

“Peace be upon Muhammad and his followers,” some shouted. “The tyrant is gone,” another cried. Pandemonium reigned in the shadowy room. A voice interjected: “Leave him for eight minutes. No one pulls him down. Leave him for eight minutes . . . .Everyone back please, everyone back.” Saddam’s body swung beneath the trap door, eyes partly open, and his neck crooked, like his many nameless victims. He swung like the corpses of those who had been executed in his name in prisons across Iraq throughout the Baath party’s 35-year reign.

Those close to him said he had known for months that the end was coming and had no illusions that he would survive. But he wanted his dignity. The man whose vanity led him to portray himself as the defender of the Arab world was determined to get the better of his adversaries. He refused their offers of cigarettes and a last meal of chicken. When the hangmen took Saddam into an unheated room before Judge Munir Haddad, one of the nine judges who had upheld his death sentence on Tuesday for the killing of 148 Shia villagers from Dujail, north of Baghdad, after a 1982 assassination attempt on his life, the man did not panic and chastised his enemies.