So what would you do if you lost your job tomorrow with no warning and no severance?

Not appliable in my case, because I don't even have a job.

What would you do to replace your income until you found / in lieu of finding a new job?

Wouldn't be a problem. I have enough passive streams so if my company went belly up today I wouldn't go bankrupt at all.

What would be the biggest change in your expenses?

Nothing much, you can always change fixed expenses (that's the main area to change if income is lowered).