People try out the new 850ft-long SlotZilla Zipline at the Fremont Street Experience in Las Vegas, NevadaReutersA competitor performs an extreme motocross jump over the Shanghai skyline to kick off the Kia World Extreme GamesAFPA competitor trains for the Climbing Wall competition during the World Extreme Games in ShanghaiReutersA giant billboard of a cat is seen behind a CCTV camera in LondonGettyA tourist jumps inside an upside-down house at Fengjing Ancient Town, Jinshan District, south of ShanghaiReutersMorris Men dance on May Day at Bradgate Park in Newtown Linford, LeicestershireReutersA man wearing devil make-up looks out of a railway carriage as he travels through Germany's Harz mountains to celebrate the Walpurgisnacht pagan festivalReutersProtesters shield themselves from police water cannon during a May Day demonstration in IstanbulReutersMembers of Ukraine's State Security Administration (R) clash with members of the Euromaidan movement's self-defence units during a rally outside the cabinet of ministers building in KievReutersRebel fighters prepare to launch an anti-tank missile towards forces loyal to Syria's President Bashar al-Assad in Maaret al-Naaman village, in IdlibReutersMichael Stanek hugs his daughter Kennedy Stanek as they take a break from helping friends sift though the rubble of their tornado-destroyed homes in Vilonia, ArkansasReutersMarla Jackson salvages what she can from the area that was the kitchen in her parents' home after it was destroyed by a tornado in Louisville, MississippiGettyJerryco Green climbs over a collapsed structure as he looks for items in Tupelo, Mississippi after a tornado hit the townReutersDamage due to flash flooding is seen along Johnson Avenue in Pensacola, Florida, USReutersFireworks explode around the medieval Fort St Angelo in Valletta's Grand Harbour, as Malta celebrates the 10th anniversary of its accession to the European UnionReutersPassengers walk through a terminal upon their arrival at the new Hamad International Airport in Doha, QatarAFPA gust of wind blows off Pope Francis' cap during his weekly general audience at St Peter's Square at the VaticanReutersGoalkeeper Cassio Ramos of the Corinthians football club holds a replica of the helmet worn by late Brazilian Formula One driver Ayrton Senna before the start of their Copa do Brasil match against Nacional AM in Manaus, on the eve of the 20th anniversary of his death during an F1 race in Imola, ItalyReutersSouth Sudanese children displaced by recent fighting pose for a photograph at a camp for the internally displaced in Bor town, Jonglei stateReuters