Simplify the following text for a Grade 9 native English-speaking person.
Original: He is best known for setting the official Guinness Book of World Records record for the `` most consecutive days spent surfing '' ( 10,407 ) and his appearance in Step into Liquid .
Simplified: People know him for making the official Guinness Book of World Records record for the `` most days in a row surfed '' 10,407 and his acting in the movie Step into Liquid .