A doctor's son threw himself to his death from a sixth floor window after taking just one puff of a powerful 'skunk' cannabis joint, an inquest heard today.
Ahmed Shammam, 23, began behaving erratically and frothing at the mouth after taking a 'deep puff' of the joint in the early hours of July 30 this year.
Friends frantically tried to stop him as he ran in to the bathroom and out the window, falling 75 feet to his death.
The electrical engineering student, who suffered hypersensitivity and claustrophobia, called out for his mother before plummeting to his death.
He died instantly of a ruptured aorta, but received multiple injuries on impact, Westminster Coroner's Court heard.
Deputy coroner Dr Shirley Radcliffe said: 'This is the first time where I have come across something where it's a reaction to a very small amount.'
Consultant pathologist Professor Sebastian Lucas said that toxicology reports at first showed no signs of the drug.
It was only when it was sent back for a second check traces were found in Mr Shammam's blood. No traces were found in his urine, as it had not yet been processed by his body.
Only 2.5 mg of cannabis were found - any lower and it would have shown no trace, said Professor Lucas.
He added: 'Cannabis can sometimes make people do very strange things very quickly.'
Mr Shammam, a Libyan national who had been in London for just four days, had spent the evening dining with his three pals close to the flat in Evelyn Court, Stourcliffe Street.
No alcohol or other drugs had been consumed, and Mr Shammam was a strict Muslim.
Recording a verdict of accidental death Dr Radcliffe said: 'On returning back to the flat it appears the cigarette was smoked by Mr Shammam that was described as being composed of strong skunk.
'His friends reported that Mr Shammam took a long deep puff and then his behaviour became odd and erratic.
'He frothed at the mouth, he rushed in to the bathroom and went out of the window to the area below the flat.
'Whether this is an acute reaction Mr Shammam suffered as a result of the psychoactive substance in the joint, or whether this is a reaction to another substance in the joint we will never know for sure.
'We know that cannabis is psychoactive and can cause pyschological disturbances.'
Police Sergeant Ian Benjamin said: 'I think his friends were trying to prevent him going out the window.
'I think they tried to physically try to stop him. But the window was low to the ground and they wouldn't have been able to stop him.
'They said he called out for his mother.'
In a statement read to the court, his father Professor Omran Shammam, a medical doctor in Libya, said his son had planned to study business after completing his studies in Dubai.
He said: 'He was a very bright student and had received a scholarship from the Libyan Government to study at the American University in Dubai.
'He had two older sisters and four younger brothers.
'The family have always been very close. We are all inconsolably distressed by his death.
'The incident came as a complete and utter shock and has devastated his family and friends.
'He was much loved and had a bright future ahead of him. His loss has left a big hole in our lives.'
Shammam was on a summer break from his studies at an American University in Dubai, for which he had received a grant from the Libyan Government.
The inquest heard how he had spent time in America before flying in to visit friends in the capital. He was due to fly to Barcelona before returning to Libya to spend Ramadan with his family.
By DAILY MAIL REPORTER
Last updated at 5:13 PM on 17th December 2010