of the perfect wedding day at a wedding expo. for allison and shawn, the big day is approaching fast. allison: we're getting married on 8/18/18. chriherepending a lot of money to make their matrimony memorable. shawn: twenty-five. allison: twenty-five. shawn: twenty-five k, yeah. allison: thousand, yes. female: i'm so glad you guys could make it. chris: they expect everything to go just right. female: short, sweet, and perfect. allison: oh, my god. chris: but weddings are not always perfect. shawn: thank you very much. patty spiers: 'cause you never know what happens, unfortunately. chris: patty spiers has planned weddings for 20 years. patty: everything from planning every last detail to playing psychologist sometimes and talking down brides. chris: she knows from experience that some problems just can't be avoided, like, say, a heat wave. patty: when i got the bride into the church, it was 121 degrees. the a/c in the church gave out. chris: that's why patty recommends the one...