Mine tend to come from being over confident in my math. I like to "invent" my own patterns and proceed full of exuberance only to discover I made a simple calculation error.

Buying material from somewhere whilst on holiday, getting home and realising you are short? Unpicked slipping and ripping the fabric? List is countless and I bet most of us have done at least one of them before now, I know I have and it's usually when I become Scarlett O'Har- tomorrow is another day lol ��

That's funny! I've done all those things but seeing that others have too made me laugh that I am not alone!

I am surprised that a cat who climbs up quilts on an ironing board is still alive!! Sounds quite dangerous to the cat.

I used to do hand quilting for a lovely lady with a quilt business. As she got older she had her daughter make the tops. She sent me one, all basted, full size. I was about half way through quilting it when I got to one part that was way off. Think, 9 patch blocks interspersed with plain blocks, well, one of the 9 patch blocks was clearly smaller than the rest of them, with resulting pulling and distortion of the rest of the area.
I didn't want to "drop a dime" on her daughter, so to speak, but in the end I called her and told her about it. She said to go ahead and quilt it.
I knew it was a special order and could only imagine the customer seeing it. Glad I wasn't there.

ETA - I have always been worried about putting a quilt together with backing wrong side out, although I have never done it. Still, I check it a few times.

Picking out what I thought were great coordinating colors in the store, only to make a block and realize they are not so great after all.

leaving a UFO where the sun can find parts of) it daily for a long time

leave a UFO where the sun can find parts of it daily for a very long time...

You're tired, you need a break, but you only have a little way to go to finish the quilt...than poop happens.

i love this, I died laughing when I read about the cat and quilter crying. Thank-you for a good laugh. Bye the way, that must have been one heavy cat.

You spent hours marking your quilt with that little purple pen & woke up the next morning to find it all but completely disappeared.