Michael,
The trip from Davao City to Manila was interesting. We headed towards a complex of weak thunderstorms. For about 20 seconds, the plain hit some relatively severe turbulence and began to jack upwards by one of the updrafts! It swayed from side to side and bumped upwards. Obviously the plain tries to stabilise and does a reasonable job. And then a sudden drop. And people yelled haha. Then back to smooth again haha out of the updraft!
Jimmy