Well then the problem here is simply that you aren't considering the fact that a 250 point rise or fall is 1.8% of 14,000 but 3.6% of 7,000.
Of course there are more 250 point rises or falls today than there ever were before! It would be very unusual if there weren't.
Black Monday in 1987 was a drop of 508 points, or just over 20%. It was the second worst percentage drop in history. To equal it today, we'd need a drop of
2900 points. Could you imagine a drop of 2900 points in a single day!? [edit: And the 1987 Bear Market doesn't even make the list of the top 10 worst in history, below.]
The greatest points loss was 684 points on 9/18/01, just after 9/11. Unfortunately, I'm having trouble finding good info about that crash - such a big event that there isn't much news about it!

. Near as I can tell, the market was trading in the 9,000 range before that day, making it a 7.6% drop
What we are seeing today comes nowhere close to those types of magnitude.
Yes. That's what the article I posted did with it's lousy title.
Here's an interesting article: http://chartingstocks.net/2007/03/04/and-the-crash-of-2007-begins/
Unfortunately, it was published in March.
Here's a list of the ten worst crashes since 1900: http://mutualfunds.about.com/cs/history/p/crash10.htm
Now these are not one day events (part of my point here is that one-day events are largely meaningless and because of that, I can't find a list of them), but anyway, only
two of these happened in the past
sixty years and only one in the past 30. Number 10 is 2000-2002, during which the market lost 38% of its value. Due to the fact that the market was vastly overvalued and people knew it, this one caused about the mildest recession you can have and still call it a recession. And we did not double-dip after 9/11.
Given the clear fact that the markets have been far more stable in the past 60 years than in the previous 50, I don't get too worried even by a one-day, 500 point drop.