A rider pulls off hair-raising stunts (特技) to wow audiences in Bangladesh. He rides vertically (垂直地) up the side of a wall. Motorcyclists rode around a steep (陡峭的) “wall of death” at 50 miles (about 80 km) an hour. They ride the high wooden wall for 10 minutes, performing 20 shows a day for regular crowds. Dressed in T-shirts, jeans and flip-flops (人字拖), they have no protective gear (保护装备). Up to 100 people can watch at a time. They offer cash to the riders so they can earn extra (额外的) money from their tips.