I just thought I'd comment on the rsl12's comment that you can only get an effect from breathing alcohol vapour in large quantities. If you want a qucik rush and a different way to drink a shot of vodka, cointreau or others like that:
Get a tall glass and a coaster. Pour your spirits into the tall glass and cover with the coaster. Place your hand firmly over the coaster and proceed to shake the glass vigorously up and down. When you stop, quickly uncover the glass and place your mouth over it, inhaling a big gulp! Woooosh!!! then Quickly drink your spirits but don't swallow. Instead, swill the drink vigorously around your mouth like it's mouth wash. When you just can't take it anymore, swallow. This is pretty guaranteed to almost jknock you out! It's a fun thing to do if you're bored. Don't do to many, be good now.