There have been many people claiming that the Bajak Flux Capacitator they built 'held time', as in stopping it completely when the rays were subjected to clocks, watches, and sliced apples (They didn't rot). But who am I to say it is true, I've never build such a thing, neither do a plan to soon (at the age of 12? Hell no!), I don't wanna be messin with capacitators.
David Hamel suggests that the egyptians built time machines in their pyramids, using magnets as the the source of energy (research David Hamel and the 45gd), once you read it all, you start to think, "It's not that complicated".
I have a very little understanding on physics, but I know enough to prove my point.