OK, you will have to forgive my shaky amateur work, here. It was my first trip using a GoPro and I had no previous practice. I learned a lot, but what I have NOT learned yet, is how to edit the clips to get rid of the bad moments. This video was on a night dive. Our guide was showing how the marginatus feels movement through the sand to find crabs and fish buried there. He pushes his sand spike (normally used to push in the sand to stabilize your position). The octo feels it and dives for it. It becomes very obvious to the octo he is being tricked and he throws a little tantrum, dashing at the guide. What follows is good video of the "bipedal" type movement. In no way was this guy harassed other than my following it. When he hid, the video was stopped.