Pop Off Valve, for IndyCar fans

Marco Andretti bumped his way into the 2011 Indy 500 field at the expense of his Andretti Autosport teammate Ryan Hunter-Reay during Bump Day at the Indianapolis Motor Speedway.

There may not be a more dramatic single day in racing than Bump Day at the Indianapolis Motor Speedway, where drivers make a last-gasp attempt to become part of the 100th Anniversary Indianapolis 500 starting field.