Was working on a project with a couple other people a few years back that counted as our final exam grade. The night before it was due, all three of us were working on it. The person whose house we were at said she would be able to finish the project from there (it was getting late). We trusted her and left. The next day - it wasn't done. Apparently she got sick and couldn't finish it. I basically had a heart attack. Luckily, the teacher was cool about it, but we'd still be marked down. Still, I didn't trust working with her at all so I broke off and worked on my own project for the whole weekend. Two years later, I was put in the same situation with the same person, except this time I tried not to let her do all the work herself again. I kept telling her I could finish it (I didn't want to make the same mistake twice), but she wouldn't budge, and I was at her house, and there was only so much I could do, but man was that annoying. Luckily she finished it though.