I would say the seeds were traveling no faster than 70mph. Also the seeds were secured in a little case with foam, which would prevent rolling and possibly provide a comfy ride for the mites.Depends on how fast the seeds are traveling. Also depends on if seeds are rolling or just driving around. If rolling at 10mph and weighing in at .1g with a radius of .175” a seed would have an angular velocity of 6408 RPM, tough to hold on in my opinion