Was it a loud, sudden bang, or more of a dull thud?
more of a dull thud?
They do that sometimes. You have to learn not to baffle the fuzzy logic. An industrial thud can come from driving slowly down a motorway then, when there are roads that deserve it, pushing it, and then braking for a roundabout.
no-one else had the same ??sounds like i may need a visit to the stealer