This is a list of important guerrilla movements. It gives their English name, common acronym, and main country of operation. Many groups have been left off (see external link (http://freelebanon.org/articles/a167.htm) for list of more groups), and some may be better classified as terrorists than guerrillas.
... the "rolling" point, but the gyro will also be accelerated to a smaller extent by the slipping friction.
The device is covered by US patents 3,726,146 (1973) and ...