My mother had her second wedding on horseback. It wasn't all that glamorous. XD She rode my ex step brother's mare Fred, who was just fine with the big puffy dress. However, my ex step father's mule, Fancy was not, and he ended up having to get off to kiss her. I was a flower girl, if I remember correctly, and my green pony Sailor tried to charge up the hill that I was supposed to be showering with flower petals. My sister's ride went okay, though, on a steady paint mare also named Fancy who took the liberty of letting out a long, loud fart in the middle of the ceremony. ;)
My mother chose not to have horses in her third wedding. ;D
I sure thought it was fun though!