Re-write the sentence using a simile to make it more impactful.
He was slippery like an eel.
He was as slippery as an eel, impossible to hold onto or pin down.
Complete the following task based on the instruction and optional input provided.### Instruction:
Re-write the sentence using a simile to make it more impactful.

### Input:
He was slippery like an eel.

### Output:
He was as slippery as an eel, impossible to hold onto or pin down.