Give me a saying that expresses surprise.
"Well, I'll be darned!" or "Well, knock me down with a feather!" are two sayings that can express surprise.
Complete the following task based on the instruction and optional input provided.### Instruction:
Give me a saying that expresses surprise.

### Output:
"Well, I'll be darned!" or "Well, knock me down with a feather!" are two sayings that can express surprise.