Just realized when I got back from vacation that I forgot a fresh growler of Edmund Fitzgerald in my parents refrigerator. I know almost everyone has had something similar happen to them. What is the bigest thing you forgot, lost had come up missing. Forgot something in a fridge, forgot something at a friends house after a party tasting, something come up missing in your luggage when flying?
I forgot to buy a 2nd case of Peche Mortel when I was in Montreal last August and the other 8 bottles of http://beeradvocate.com/beer/profile/11056/46644 that the clerk in Quebec City was willing to sell me.
I went to a family party with the wife and kids and a few bottles of Cantillon. We were halfway home when I realized I'd forgotten to take 2 unopened bottles back with me... And I realized I left my wife there as well... It was quite the conundrum: going back to get my beer meant the wife would join us as well. Luckily it all worked out. I just called my aunt and asked that she watched the bottles and my wife for a few days so I could find time to get over there after work.
Left 5 or 6 cans of dales pale at a friends house last weekend. no big deal, since they won't go to waste.