Nick,
This kind of question has been interesting me lately (especially in terms of probabilities, human behavior and investing).
You have to ask yourself "in the long term, are these two events normal?" Dr. Bruce hit on that by pointing out 1 crunch per year at ERAU is normal.
Fortunately, the human brain is a great pattern-recognition machine. We can learn stuff real quick. Unfortunately, it also "recognizes" patterns when none are really there. For example, if you were flipping a coin, you'd be pretty likely to flip heads 5 or 6 times in a row, even though a fair toss will be 50/50 (over an infinite number of tosses, by the way). But you couldn't conclude from a string of 6 in a row that the coin was unfair. Likewise, 2 short field errors within 15 days doesn't necessarily mean this school is bad.
Here's a quote from Dan Kahneman and Amos Tversky, two pioneers in the field (and by coincidence, I just found this quote in an article today):
People assume that the pattern of the a large population will be replicated in all of its subsets. But clusters will occur simply through chance. After seeing a long sequence of red on the roulette wheel, people find it hard to resist the idea that black is "due" -- or else they started to wonder whether the wheel is rigged...Truly random patterns often don't appear random to us.
-Rich