I don't know what happened. I have made the Cake Bible's chocolate lover's angelfood cake many, many times. This time, however, when I turned it upside down, a piece of the top detached, and then, about thirty minutes later, the cake disengaged from the pan. This has never happened before. I'm sure that it's not under-baked, and I don't think that it's over-baked either (but I'm not entirely sure, although I baked it for the usual amount of time). I have left it in the pan, but I turned the pan sideways to prevent further disaster. Should I start all over again?