Incredible Sealegs Amphibious Boats

We thought we saw a boat up on blocks at Polzeath Beach yesterday, then the family came down the cliff path from their hotel,

climbed in their RIB (rigid inflatable boat)..
and drove off into the sea.. while we stood and watched open mouthed.
Check out this video on YouTube:

http://www.youtube.com/watch?v=uMR2Azr-NsI&feature=youtube_gdata_player

(Sent from my iPhone which is wonderful of course
But less so when fingers hit buttons by mistake)