A method of isolating a section of downhole tubing comprises: running a length of expandable tubing into a tubing-lined borehole and positioning the expandable tubing across a section of tubing to be isolated; deforming at least portions of the expandable tubing to increase the diameter of the portions to sealingly engage the tubing and to isolate the tubing section. The passage passes through the body and extends between an inlet and an outlet. Accordingly, containing space on the four-wheel vehicle at the time of mounting the two-wheel vehicle can be made to be small. Also, the method provides presenting the video captured of the second participant such that the second participant appears at a first position of a meeting location in the first view to the first participant. Adjusting the pressure controls the asphericity of curvature. The micro-gyroscope is tuned by automatic electronic compensation based on quadrature error that is applied to correct for variations in the gyroscope.