Cancel your original ticket as far in advance of your travel date as possible. Many airlines have restrictions as to how soon before a flight, often 24 hours, your are able to return a ticket for refund or voucher. If you simply don't show up on the day of your flight, your ticket probably will lose all value.
Barry Bonds holds the Major League Baseball home run record with 762. He passed Hank Aaron, who is currently second with 755, on August 7, 2007. The only other player to have hit 700 or more is Babe Ruth with 714. Alex Rodriguez (696), Willie Mays (660), Ken Griffey, Jr. (630), Jim Thome (612) and Sammy Sosa (609) are the only other players to have hit 600 or more; Rodriguez is also the active leader in home runs.
Mark Whiten, for example, tied Jim Bottomley for the most runs batted in in a single game with 12 in his four-homer game. Shawn Green hit a double and a single along with his four home runs for 19 total bases, an MLB record. It surpassed Joe Adcock's mark of 18, which also came from a four-homer game.