This chilling video shows self styled terrorist Pavlo Lapshyn teaching himself how to make and detonate explosives like those he used to blast Black Country mosques.
The frightening film footage - found on his video camera - was released as the Ukrainian white supremacist was jailed for at least 40 years for outrages that shocked the nation.
They show him training in a forest believed to be in his home land. He blows up a tree and then proudly turns the camera on himself as he goes to examine the damage that the DIY explosion cause.
When the 25-year-old postgraduate student was arrested, police found the room where he lived in Birmingham filled with bottles of the chemicals used to produce the home made HMTD explosive that blew up outside mosques in Tipton, Walsall and Wolverhampton.
Police found hundreds of images and several videos on Lapshyn's computer relating to him managing and detonating devices, apparently in Ukraine.
They also discovered folders and a website history littered with neo-Nazi and white supremacist content, a video game entitled Ethnic Cleansing and a trail of how he dilligently researched making bombs and planned where he would detonate them.
Judge Nigel Sweeney said as he jailed Lapshyn at the Old Bailey in London yesterday: "It is clear that even before coming to this country you had already been manufacturing and detonating improvised explosive devices in the countryside in Ukraine, as well as researching locations in Birmingham where you could buy components."
He continued: "You clearly hold extreme right-wing, white supremacist views. Such views, hatred and motivation are abhorrent to all right-thinking people and have no place whatsoever in our multi-faith, multicultural society.
"You were intent on finding a Muslim to murder. It seems to me you acted alone and were motivated by your extreme appalling prejudices."
The nail bomber's 90-day campaign of terror began just five days after he entered the country. He stabbed Mohammed Saleem three times in the back, killing the 82-year-old as he walked home from evening prayers in Birmingham on April 29.
On June 21, he targeted Walsall's Aisha Mosque in Rutter Street, Caldmore, when he planted explosive devices in a child's lunch box at the mosque gates.
Then seven days later he placed a bomb on a roundabout near Wolverhampton Central Mosque.
West Midlands Police footage of the interview with jailed terrorist Pavlo Lapshyn
But his most serious attack was at Kanz-ul-Iman mosque in Tipton, where he packed hundreds of nails in a bomb on a railway embankment next to the mosque's car park.
Worshippers were only saved from serious harm as Friday afternoon prayers were being held an hour later than usual on the first Friday of Ramadan.
Lapshyn said he had planted the bombs because he wanted to 'increase racial hatred'.
On Monday Lapshyn admitted murdering Mr Saleem, causing an explosion on July 12 and engaging in conduct in preparation of terrorist acts between April 24 and July 18.
Lapshyn - wearing a long sleeved black top and with a short dark haircut - spoke only to confirm his name at the sentencing, which was translated to him through an interpreteur.
The court heard that when asked why he had committed the crimes, Lapshyn simply answered 'racism' and then added 'so I would like to increase racial conflict'.