Ressurected for two reasons: we have reached the twentieth example of the same thing, and I note that Flight Safety is amongst us again: perhaps he/she would like to address some of the questions above.. .. .Now for the current list:1. David with his rock in a sling Vs Goliath.. .2. A girl holding a chain on a merry go round.. .3. A marble on a rotating disc.. .4. An Alcohol pump.. .5. Droop stops on a rotor disc.. .6. A car going around a round about.. .7. A steel ball on a chain.. .8. A tractor on a chain around a stump.. .9. Liquid dye on a rotating disc.. .10. Sattelites and orbits.. .11. A dairy farmer's centrifuge.. .12. a science lab centrifuge.. .13. NASA & USAF centrifuges.. .14. a man on a cornering bus holding a helium balloon.. .15. a pilot's bodily fluids.. .16. a jar full of water.. .17. ANOTHER cornering car.. .18. a 35,000 Kg truck and cardboard Britteny Spears cuttouts.. .. .The new ones:. .. .19. Main rotor blade seperation.. .20. A Korean war Fighter pilot whom ejected from his rapidly rolling aircraft using centrifugal to carry him clear of the airframe.. .. . <img border="0" title="" alt="[Big Grin]" src="biggrin.gif" /> <img border="0" title="" alt="[Big Grin]" src="biggrin.gif" />