I've dabbled a little bit, but every time I get started I end up blowing out a joint, so I haven't progressed much. I've done:

Ki Aikido
Judo
Ninpo Tai Jutsu
Hap Ki Do

Once I get out of school and actually have money again, I think I'm going to get back into Aikido.

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Whan they come, Ah sall staun mah grun
Staun mah grun, an be na afraid.
Thochts ae hame tak awa mah fear
Sweat an bluid hide mah veil o tears.