100% true story.
One of our equipment operators came up to me yesterday and pulled out his phone to show me a picture. He said someone cut the hard line to the right side brake on his rear axle. Sure enough, the picture shows a pretty rough looking cut with brake fluid everywhere.
I suggested he remove both parts of the line and go to his local parts house and find a premade line that’s close to the same length. He asked what I thought about using heat shrink as a butt connector to the two halves until he can make the repair. I was a bit shocked, but explained the brake pressure would just blow it out. He then asked if doubling up on the heat shrink would make it work. I thought about it for a minute and then said probably and quickly walked away.