Lemon drops

So a man walks into a bar and sees a big tough guy standing next to a glass and some lemons.

"What's with the lemons?" he asks.

"Its a challenge." replied the bartender. "This here is the strongest man in the world. He will squeeze as much juice from half a lemon into the glass as he can, and if you can squeeze out even one more drop, you win free drinks for the rest of the year."

The man watched several other strong looking men try the challenge, and all of them lost miserably.

"I accept" replied the man.

The bartender snorted a bit seeing as the man weighed little over 120 pounds and had very little muscle mass.

The strong man squeezed almost a third of a glass of juice from the lemon and when he was done, handed the lemon to the scrawny man.

He took the lemon and sized it up in his hand, and squeezed almost 5 drops from it.

The strong man reeled and replied "Wow! You are stronger than you look! I went easy on you."

"Fine. " said the skinny man, "Try again if you would like."

So the strong man then spent a food 3 minutes squeezing the lemon more than he had for any of the other men.

Once he was convinced even he could not summon even another drop from the lemon, he handed it to the skinny man.

The man then proceeded to squeeze another 3 drops from the lemon.

"Amazing!" cried the bartender. "I guess you can have free drinks for a year! What is your secret though? How did you do it?"

"I'm an IRS agent" the man replied.