Maybe it's just me, but I'm not really worried about any of it. I just want to celebrate my love for the man in my life, as he will do with me.
Of course, I wouldn't like it if my dress ripped or I tripped going down the isle, but at least my wedding wouldn't be like anyone else's that way. They'd be memories that only I would have.
If anything, it would upset me if something truly different or unique DIDN'T happen on my wedding day.