Generate a joke that is related to physics.
Output the joke.
A neutron walks into a bar and asks how much for a beer. The bartender replies, "For you, no charge."
Complete the following task based on the instruction and optional input provided.### Instruction:
Generate a joke that is related to physics.
Output the joke.

### Output:
A neutron walks into a bar and asks how much for a beer. The bartender replies, "For you, no charge."