Webb Telescope's Integrated Science Instrument Module (ISIM) is tested on the very large centrifuge at the NASA Goddard Space Flight Center - May 2011.
The centrifuge simulates the increased feeling of gravity's pull during a launch. For astronauts, that's normally a few minutes at two or three times the force of Earth's gravity, measured in Gs. Equipment carried in space shuttle cargo bays usually sees between 6 and 7 Gs because of vibration.