Arizona Raiders, with Audy Murphy, probably at the age of 10. I thought it was the most sophisticated thing ever. I saw it again as an adult, and realized it's dreadful.

Lubricating the cork in a saxophone neck or a clarinet tenon. It turned out to be not a good idea at all, since the Vaseline speaks into the cork and dissolves the glue holding the cork to the instrument. But until then it does a great job.