Not to stress out any anxious brides and grooms out there, but pretty much everything can go wrong at a wedding. Caterers could screw up, the cake could hit the floor, two serial pickup merchants could crash the party looking for one night stands only to fall in love — oh, wait, that’s Wedding Crashers. You get the point. There are enough wedding pitfalls to sustain another century of situational comedies. But there’s one particularly crucial moment, the toast, that’s potentially rife with danger.