As coincidence would have it, the next spell on my todo list is Thermal Pulse, looking at wiki it mentions that the abyssea ones switch to ball stance much less often, making them great Thermal Pulse prey, but not so good for cannonball.
Any big damage spells or crit hits will likely cause one to curl up, so may be an idea to set low damage spells, such as Bludgeon. Gullycampas are far less likely to curl up in general, so those with access may wish to attempt to learn this spell in Abyssea - Attohwa
That said you will probabally have a much easier time learning cannonball in Mount.Z. Edited, Aug 21st 2011 2:05pm by GenryuOfBahamut