Can you butterfly for 77km in 64 hours?

Kingston Woman Swims Lake Ontario and Breaks Two Records Darren McEwen Thursday, August 18, 2005 6:34 AM Marathon swimmer Vicki Keith is catching up on some much-needed rest as she, once again, enters the record books. The Kingston woman completed her swim across Lake Ontario late Wednesday night. Kieth swam 77 kilometres butterfly, breaking her old record but fell just short of a plan to swim 80 kilometres. The 44-year-old woman also set a record for spending the longest amount of time swimming in open water. Keith, who didn't plan to set the record, was in the lake for 64 hours. She made the gruelling trek to support a local charity. Keith became the first and only person to complete a double-crossing of the Great Lake 19 years ago. From www.cfra.com/.../index.asp Isn't it crazy? How does one do fly for 64 hours straight?