Yeah, they can be impractical, though I've done some talking and whatnot with a friend of mine who trained in Praying Mantis, and he showed me some very interesting things. It reminds me of Dim Mak, where you strike with spearhands to the jugular, side of neck, side of head, upper lip, under the clavicle, back of hand, inside of elbows, solar plexus... etc, in rapid succession. Also, I see this training to be beneficial in maybe combating finger locks or drasctically improving grip strength. By the way, what I have available in my area: Aikido, Wing Chun, BJJ, JKD, Escrima/Kali/Arnis, Shoot Wrestling, Okinawan Karate, Iaido, TKD, TSD, Kickboxing, Savate, Boxing... that's all I'm aware of, I'm sure there's a whole lot more.