I got the news from a director in another division, and I'm sure he was expecting anger or waterworks, not smiles. I explained that with no mortgage, no car payment, vacation payout and a severance package, I'd be fine. This certainly was not what he expected. I wasn't FI at that point, but I certainly wasn't panicked because I was laying the groundwork and I know from that experience that if it happens again I will be fine, and depending if/when it might happen again I might even be ready to FIRE for good. Taking steps toward FI gives you options, even in the earlier stages.
My dad's story is similar. When he was laid off in 2012 at the age of 61, he got called into the office, walked in, and started making jokes. His bosses laughed and were relieved because obviously most of their interactions with people that day were not pretty. Having been a programmer his whole life, my dad was pretty excited about being free to pursue something else. He was thinking about just finding a new fun job, like being a park ranger, or something. He ended up going back to programming, but he felt freedom because of his financial situation.