Yeah, weird things happen. It could be the law of averages...things have to even out at some point. It could be Murphy's law...a double fault at a crucial time?! It could be plain nerves for one and a 'go for broke' attitude for the other. Whatever it is, you can't really figure it out. It's one of those inexplicable things where all you can do is wonder 'what if'.
What if...I hate that thought.