I pulled out the vanilla extract, and found that the top was stuck. I mean, stuck. I tried everything - the grip-twist-opener, hot water, cold water, smacking the top - nothing was working. There was no one else to ask for help. I was SO FRUSTRATED.
So I got a steak knife, stabbed the vanilla bottle, and calmly poured the extract from the newly-forged hole into the batter. I did in front of all the other ingredient containers, so they would know not to mess.
Stress relief achieved. The cookies were pretty good, too.