There's being a wee bit sick and "oh I feel bad, not gonna go to work today" and then there's the really ill thing, when you cannot even do yuo favourite thing.
So when do you know you're really sick/ill?
For me; yesterday I went to the DZ. Had a few beers, went to bed. Woke up, on load one, 13 000 feet next. Bundle of money to burn in my pocket, nice weather, cute student girls who're easily impressed by people who fly in other positions than the Box-Man.
And I signed myself off the lift, took a 1.5 hour busride home, a bunch of pain killers and am now feeling utterly and totally ****ty.
And I got a double eye infection (but was gonna jump with that - no matter that I can't see **** without my lenses and I had no glasses with me).
That's how I know when I am really sick.
What about *you* chaps? When do you know?