A blur, and yet...
I know better. Last Sunday I spent a bit of time wandering on the New Hampshire coast. Wandering with my camera, but without any type of support.
I think that even with a tripod it would have been a challenge for me to catch this crazy bird's dash across the sand with a blurred background and an in-focus sea gull. Not a problem - I'll just add that to my list of skills that need to be honed.