Happens to me but only when I have shoes on and press too hard...therefore , I usually sew barefooted.
I am looking for a Janome Magbolia 4500 just because I tried one at retreat and love that it can be adjusted to go slow no matter how hard the foot presses......With my vision, this will be helpful....Too fast for my eye to keep up sometimes....
At least no one discovered ghostly occurences in those feet. LOL.