Not As Planned. Test Goes Wrong Jet Powered Bike

So as is the nature of building your own jet engine, things don't always go to plan. We don't have the money of like ROLLS ROYCE ..... so we have to make things the best we can. The starter system is not the only thing unique on the Jet Bike, but after nearly a year of problem solving, the system worked well. Well that was until the last test, when for some reason it spat the "O" ring out that grips the front nut on the engine to spin it up

THIS IS HOW IT SHOULD GO

THIS WHAT HAPPEN AT THE KEY PART AT THE END OF THIS VIDEO