1 / 4   If you love racing, have a sense of humor and are interested in showing off imagination and creativity, the Red Bull Soapbox Race in Lisbon, Portugal on Sunday must be an experience you can’t miss. /VCG Photo

2 / 4   Amateur riders in handmade vehicles resembling manjerico, sheep and fax machine competed downhill against their biggest opponent gravity, being dependent only on human strength. /VCG Photo

3 / 4   First held by the Red Bull company in Brussels in 2000, this race without motor, proposes to the participants the construction of a cart that defies the norms of the design and laws of physics. /VCG Photo

4 / 4   Using gravity to get to the bottom of the hill, teams are judged on both the time taken to complete the course as well as the showmanship of a performance at the start of the race. /VCG Photo