Generate a funny joke from the given prompt.
Two cows in a field
Two cows were standing in a field. One cow says to the other, "Are you worried about mad cow disease?" The other cow looks at her and replies, "Why would I be worried? I'm a helicopter!"
Complete the following task based on the instruction and optional input provided.### Instruction:
Generate a funny joke from the given prompt.

### Input:
Two cows in a field

### Output:
Two cows were standing in a field. One cow says to the other, "Are you worried about mad cow disease?" The other cow looks at her and replies, "Why would I be worried? I'm a helicopter!"