What's going on inside my engine ?

Great question !  The following vid shows what goes on inside a cylinder in an internal combustion engine, excellent footage.

http://youtu.be/sEf8va1S7Sw

Glass Steam Engine.

This may seem cute to the uninitiated, but the skill, and engineering gone into building this is amazing! I'd love one.  Hint, hint family for my next gift occasion ;-)

http://youtu.be/73txXT21aZU