Kurt and Todd, in there never ending quest to annoy each other, were having an argument. But not their normally, or what qualifies as normal for mutants, type of argument.
No, they were arguing about which one of them had the more dangerous life.

"X-men have way more ways to die then the Brotherhood!"

"And I say that the X-men wouldn't know something deadly if it bit them in the ass!"

That is, if you wanted to put it intelligently.
You may be asking, "How did this argument start?" or, "When exactly did it take this direction?", or maybe even,"Why would anyone with a sane mind argue about some thing like this?". The answers to these questions may never be known but one thing is certain, this is not going to end well.

Now what exactly was said during this argument is not important. What is important is the challenged that was issued.

"Arguing is getting us you what, how about you and I make a list of all the ways we can die in our own home and compare them.
That way we can see who has a better chance of dying."Said Kurt with that face, you know the one, that face you make when get a great idea (or at least an idea that you think is great) when your arguing with someone, that triumphant but still a little stiff from residual anger look.

"You're on" said Todd, with a smirk. Huh, that one was a lot shorter wasn't it.

And so it began, the thing that would make X-men and Brotherhood alike shiver with bad memories.

The Lists of Death.