...in an apartment in the middle of the night when the residents are sleeping, does anyone hear it?
Decidedly yes. At first it is a little mysterious. What was that crash and tinkling sound? After the husband and wife consult with each other, the husband gets up and goes to the living room. He confirms that, yes, the Christmas tree has fallen over at 4 a.m. The live Christmas tree with a stand full of water that is now all over the carpet. The Christmas tree that was just decorated that very evening, and now has strewn ornaments, lights, and garland like shrapnel. Oh, and what seems like about one-third of its needles have formed a new rug for the dining room.
It took us a very groggy hour to get the tree back up in the stand, hopefully more secure (although it did start to fall over two more times while we were cleaning up, so we're not holding our breath). Thankfully, only 2 ornaments broke, and neither had great sentimental value.
As Aaron said, "It's good to have midnight adventures every now and then." Like the time we woke up to water pouring through the heat lamp in our bathroom ceiling. Or the time we heard a huge crash in the kitchen, and Aaron threw his arm protectively across me and told me to wait while he confronted the burglar - which ended up being 2 shelves of mugs that fell and shattered on the tile floor. Good times, good times*.
*But I'd rather be woken up at 4 a.m. by a baby crying than my Christmas tree toppling...