In his speech, Michael famously confuses "wedding" with "welding," stating that Webster's Dictionary defines wedding as "the fusing of two metals with a hot torch".
Dwight spends the episode hunting down "Uncle Al," an elderly guest with dementia whom Dwight mistakenly kicks out of the wedding. Meanwhile, Roy attempts to win Pam back by paying the wedding band, Scrantonicity, to play "their song," leading to them leaving together. Memorable Moments
Despite his behavior, Michael has a small moment of redemption at the end of the night when he sits and talks with the lost Uncle Al in the parking lot.
Michael, desperate to be the center of attention, becomes increasingly erratic. He is furious when Phyllis’s father, who is in a wheelchair, stands up to walk her down the aisle, upstaging Michael's plan to "co-give away" the bride.