See Through Engine Combustion at 4000 fps

[malk315]

Stumbled on this thought you guys might like it:

Too bad it's not a 2 cycle -- the ignition is firing every time the piston is at the top like a 2 stroke though.

 

[TJ the Chainsaw Mechanic]

That is perrty cool, I've watched a few vids where guys do clear heads like that. I think it's Plexi glass.