Cruising, with ventral four arms tucked in toward the mouth. Then, it nearly hits the submersible, somersaults dorsally, and jets away.
From: Young, R.E. 1995. Aspects of the natural history of pelagic cephalopods of the Hawaiian mesopelagic-boundary region. Pacific Science 49(2): 143-155.
Online abstract: http://invertebrates.si.edu/cephs/young92/cephs6.html
To see other cephalopod videos: http://collections.si.edu/search/results.htm?fq=online_media_type%3A%22Video+recordings%22&q=&fq=tax_class:%22Cephalopoda%22