After watching the video below (found here and here) I am reminded of the series of possibly less than 100% serious questions here about being weightless in the middle of a large volume and considering the options for reaction masses to get to the side and grab hold of something.
In the video I noticed that there is a central cord or rope to hold on to, possibly for this very reason (see Why did Skylab have a thick blue flexible cord running down its central axis?).
Question: Is there some official or unofficial record for the longest time that an anstronaut remained in free fall, not holding on to or being secured by anything? This could be suited or in a spacecraft, but no tethers or cords or contact with secured objects.