Can anyone tell me what's going on here? Seems like the motor makes a "clunk" noise... seems like it stops spinning then starts back up. Look at the :54-55s and at 1:01 mark.
https://www.youtube.com/watch?v=kP-paeVa0I4&feature=youtu.be
https://www.youtube.com/watch?v=kP-paeVa0I4&feature=youtu.be