Wedding Romp

There is a very extravagant wedding planned-

You decide to play a joke and walk up 2 horses to the entrance

The security stops you
but you explain how the bride and groom
want to ride out into the sunset and its all been planned out

You then unleash the horses into the ceremony kicking them hard and branding them so they gallop and romp all over the place-

Destroying the wedding and sending people into pure terror