End Of The Aisle - [s9e22] The

: Just as Barney has a last-second panic attack at the altar, Marshall delivers the eighth and final slap of the Slap Bet , officially ending the years-long gag.

In a pivotal series moment, Robin attempts to flee the wedding and literally crashes into The Mother.

While Barney and Robin prepare for the aisle, Marshall and Lily realize they have broken almost every idealistic vow from their 2007 wedding. They decide to update their vows at the altar to reflect their current life: