My girlfriend had been nagging me for ages to book her car in to get the brakes fixed on her car because they'd been making a whining sound for a little while. The task became a bit more urgent though when I pressed the brakes one day and it sounded like 2 tractors wrestling, so I was forced to get the fixed. Unfortunately it was on a Saturday morning so no Garage's open to repair them and we needed to use the car over the weekend. Never mind the fact that I had no money to pay for them to get fixed.
The only solution left was for me to fix the brakes myself which I had absolutely no idea how to do, and no instructions/service manual.. I tracked down a purchased the correct brake pads for that model car, something I was proud of on it's own...

Then I got home, got my dad's tool box out, and went to work changing the brake pads.. It was great! I got completely filthy all over my hands and up my arms. Even got black on my face... After I had done one side, I was so proud I made a "how to change front brakes" video with my mobile phone on the other side... I'm like "now you'll want to get a blah blah inch spanner and turn it this way on this bolt.... If the bolt gets stuck, wrap the rag around the spanner and hit it with a bit of metal or something to hit the bolt loose" etc. I made myself sound like a pro... I've been meaning to edit he video down to 6 or 7 minutes and post on Youtube but forgot about it totally until just then...