This galloping technique has been adapted and expanded for robots by the Biomechatronics Lab at Chuo University in Japan. Their "Snail-Wave Omnidirectional Mobile Robot," Toro II, may not look a whole lot like a snail, but check out its moves:

[video=youtube;nbcHptH947w]https://www.youtube.com/watch?v=nbcHptH947w&feature=player_embedded[/video]