Model big air extreme bounce 12ft trampoline introduction to the new big air extreme bounce trampolines the extreme bounce series from big air are our top of the range trampolines with a higher spring count than any of our other trampolines the extreme bounce range is ideal for those that are serious about their trampolining product safety here at uk sport imports we take safety very seriously and we ensure that all our trampolines have been tested to the highest safety standards by indepe