<P> Hysterical strength is a display of extreme strength by humans, beyond what is believed to be normal, usually occurring when people are in life - and - death situations . Common anecdotal examples include parents lifting vehicles to rescue their children . The extra strength is commonly attributed to increased adrenaline production, though supporting evidence is scarce, and inconclusive when available; research into the phenomenon is difficult, though it is thought that it is theoretically possible . </P> <P> Extreme strength may occur during excited delirium . </P> <P> The most common anecdotal examples are of parents lifting vehicles to rescue their children, and when people are in life - and - death situations . Hysterical strength can result in torn muscles due to higher mechanical stress . </P>

When might we be able to demonstrate superhuman strength