What was the most Ridiculous Valuation of a Stock in your lifetime?

Hello. So, I have been around for 27 years. In my lifetime, I have seen the dot-com bubble, the Housing bubble, and now bubbles such as Bitcoin. I am sure many of you posters have seen alot more bubbles than I have.

In looking for wisdom, I am wondering what ridiculous valuations have you guys seen in your lifetime? Things such as AOL, Enron, etc. What did you notice about these stocks? Thanks.