Tough Mudder has raised the bar to measure coolness and toughness and it involves filling your eye sockets with tear gas.  Tough Mudder is a brand of "fun" runs that tours the country challenging people to tackle different obstacles. The idea is to be physically demanding and challenging and "fun". Obstacles in the past have consisted of freezing cold pools and electric shock wires. Now according to dnainfo.com the tought mudder is adding tear gas.

What a lovely way to spend a Saturday morning. You can freeze, get electrocuted and pump your face full of tear gas? This sounds lovely and fun. Oh whats that, I get to pay to have this done to me? Sign me up hot dogs, I'm in!