Sleep or Alcohol.

[one_mad_cow]

I don't believe that the hangover is caused from the alcohol. You get in at 3am and you feel great!  Then you go to sleep and wake up feeling like crap!  I agree with Lee Evans, sleep is actually bad for you!

[smudge]

We could all survive without alcohol - but we couldn't all survive without sleep, so I can't see that it's bad for you. Lee Evans is a comedian after all.

[corganiser]

Depends where you are.

In bed, sleep is probably safer than alcohol. In a pub the reverse is almost certainly true. Driving a car it is probably about even.

[simms]

Thing is, you're probably still p88sed when you wake up for a wee, then the pain sets in later as all that rubbish leaves its mark on your system.