Good Riddles

Question: A man walks into a bar and buys 3 pints in total costing 5 pounds the man leaves the bar wirhout spending a penny. Hows this?

Question: There are ten horses in a field. They each have a stable. There was a storm one day and struck one of the stables. The stable burned. There are now 9 stables. Every horse has to go in a stable at night. You can't build another stable and you can't fit 2 horses in one stable. How do you fit ten horses in 9 stables?

Question: What is little in Arab and big in Barcelona?

Question: Swallowing one is fine.
Swallowing two together is fine.
But Swallow them separately and all shall fall.

What are they?

Question: I'm small but big, i hide behind you but come out when you fall... What am I?