Not wanted to push other people's active threads off first page (as new KBer) but I found this pretty amazing:
Vid of inside 4 stroke engine. (Exhaust cycle edited/clipped?) Note the spark dances around on centre electrode before leaping to outer then - ka-pow Batman. This little scene is what makes it all possible.
http://www.youtube.com/watch?v=sEf8va1S7Sw
Valve bounce footage. See how the energy in spring has nowhere to go and how it the top of it oscillates around. Amazing stuff.
Edit: correct link added while poking self in the eye for penance - sorry 'bout that.
http://www.youtube.com/watch?v=_REQ1PUM0rY
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