My lowest point was a little different. I wasn't subjected to rude comments, and I didn't even have a light bulb moment.
Mine was a simple acceptance that I couldn't do it alone. I knew I could lose weight, I'd shown that by dropping half a stone here and there, but it would always come back on when I changed whatever restricted diet I'd put myself on.
SW, for me, is accountability and support for when I hit the healthy eating wall. I've had a fairly rubbish week for eating, so when I go to WI tonight, I'll be open and honest about it. If I'd been doing it alone, I would've said to myself that no-one had to know about it, and within 3 weeks that half a stone would be back on.
SW keeps me going, especially when I've paid for the 12 week countdown!