So-called "big trampoline" or "American trampoline" is not practically used in today's circuses. It was a plank slope, lowering from the height of several metres down to the nearly circus ring, and then raising up at an angle of 45°. Modern trampoline is a dense net stretched elastically on a frame of any form; it is frequently draped behind various circuit properties. Such strength material as tarpaulin may be used sometimes instead of the net.