The technician looks into a microscope then writes something on a sheet of paper which the viewer is led to believe are drug test results. Microscopes do not reveal anything about drugs or chemicals in the human, or anyplace else. Those determinations require sophisticated analytical instruments like gas chromatographs, infrared and ultraviolet spectrometers, just to name a few.
The First Officer says, "V1, rotate." V1 is the point of no return, i.e., when the plane reaches V1 it cannot safely abort the takeoff, it has to continue. The plane does not have the speed to rotate at V1, that is a higher speed called Vr for rotate speed.