Heres a relativly easy one to do. Open your door, turn on roof fan and check to see that it wont close due to the air movement by the fan. Now lay directly under the fan with your belly round the center. If you have pk experience you might notice that the fan is producing that vacant sought of feeling. Now simply cause the door to close using the pk wheel rotation method. I am hoping that i will progress to without the fan. The fan seems to provide extra torsion field, i dont mean air movement either though of course it is.