According to Official Guinness Records,
The fastest human backbend walk - 20 m is 7.81 seconds and was achieved by James Loughron a.k.a. Aerial Manx at the Venetian VIP Show in the Venetian, Macau, China on 10 January 2015.Aerial Manx also holds the record for most backflips while sword swallowing.
For a complete list of 2015 records, please visit 2015 Guinness Records in China.