I think the finger under the nose trick came from the trick that DOES work where you push the spot right below your nose (in the middle) and it stops the sneeze. After I had my gallbladder out and it hurt like hell to sneeze, I did that and didn't sneeze. You push the little dent area below the centre of the nose. :)
Maybe it’s just me who sees this but Tell me why he looks like the type of guy to get high, get on Halo, stomp the pub, say “GG’s”, then go to sleep right after