Sleep eating

I took an Ambien last night. I slept well, but at some point got up and ate a whole bowl of vanilla ice cream with chocolate syrup - maybe two. The evidence was on the kitchen counter this morning, and I also have a very hazy recollection of doing it. This is especially appalling because (1) I'm lactose-intolerant, (2) it blew about a bazillion Weight Watcher points, and (3) I ate all that ice cream and didn't even get to have any fun doing it.