Trampoline Damaged in Brit Garden 'Splosion

From BBC:

Explosive device thrown in garden
Police are appealing for witnesses after a home-made explosive device was thrown into a garden in Lincolnshire.
Officers said the homeowners heard a loud explosion and went outside to find smoke outside. A trampoline was badly damaged by the device.
Police and fire crews were then called to the property in Little Lane, Louth.
Chf Insp Steve Bradley, of Lincolnshire Police, said: "If the device had hit someone it would almost certainly have caused very serious injuries."
Information needed
Police are now examining the device, which was a metal tube containing substances and a fuse.
Chf Insp Steve Bradley said people assembling the devices could also be seriously injured.
"We have no reason to believe it was anything other than a prank at this stage," he said.
"But clearly we want to trace those responsible and would appeal to the people of Louth, particularly those living in the vicinity of Little Lane, to contact us if they have any information."