Mudra Macros are a surefire way to summon the failbunny.

The shared cd on mudras are 0.5 seconds, which also includes queueing for latency. You have enough time between gcds if you're good enough to get a ninjutsu off, however that gcd is just short enough to make macros mess up. Especially if you're a keyspammer--cause then you'll send '/ac Jin' repeatedly to the server. If it queues up /ac Jin while /ac Jin is executing, you WILL bring Baddie the Bunny's hop of shame.