Can a analog clock run backwards without any prior tampering?

Question

Today, my analog clock, hanging on the wall fell of its hook four times. I hung it back up again after it fell for the fourth time, and that was that. The clock had already stopped once prior to this, but i set it back to the right time and it went back to normal. But a while later, the second hand, moving normally until now, started going counter-clockwise for ten seconds. I took my eyes off it after the ten seconds, but quickly looked back, and when i did, the hand was going clockwise again, but now it was ten seconds slow. Can this happen? I know that the only way to make a clock run backwards is to flip the magnetic plate around the copper-wound electromagnet in the clock 180 degrees (you can see how clocks are made to do this here: http://backwardstime-moddy.blogspot.com), and since no matter how many times a clock falls, the plate cant flip itself, this occurance seems pretty impossible. Does anybody have any ideas? A clock expert's/repairer's answer would be greatly appreciated.

http://backwardstime-moddy.blogspot.com/

^heres the whole URL

also, gravity did not make it go backwards, it actually ticked backwards the equivalent of ten seconds, in ten seconds. It then ticked fowards.

And knowing the configuation of the gears of a standard computer-chip controlled clock ( see url for reference to a smaller clock), no matter how many gears popped out (and the gears are screwed down), it all depends on the motor.

the above disproves answers 1 and 3

but keep trying

Answer 1

wow....

Answer 2

More probable a gear slipped and spun back into place

Answer 3

Sure.

You loosened the second hand enough, that gravity let it fall backwards.