If you want to be in the floor real fast I have 2 recipes:
Bump:
Fill a shot glass half with Vodka and half with Champagne (you can use other sparkling wine, there is a german one: Henkell wich is OK)
Gorilla
Take a shot glass and fill it with whatever you like: Vodka, Rum, Brandy, etc (strong stuff)
Fill a glass with beer to the level that if you put the shot glass inside it would cover it up by a little.
Then if you want to look real cool fire up the shot glass, if you don't, its ok. Then drop the shot glass carefully in the glass with beer and drink everything as a "big shot"
If you like bitter stuff
1 oz Campari
1 oz red Vermuth
1 oz Vodka or Gin
Or a very simple recipe I like is:
1 oz vodka
1 oz tequila
in a glass with grapefruit soda with a dash lemon juice.