Why does a angel food cake fall 10 minutes before done baking?

An angel food cake may fall 10 minutes before it's finished baking due to insufficient structural support as it cools. During baking, the cake's protein structure sets, but if it's removed from the oven too soon, it lacks the stability to hold its shape, causing it to collapse. Additionally, if the cake is not properly whipped or if too much moisture is present, it can lead to a failure in maintaining its height as it cools. Proper baking time and techniques are crucial to prevent this issue.