Classify a given piece of text into a specified emotion.
I can't believe this happened
This text could be classified under the emotions of shock, surprise, or disbelief.
Complete the following task based on the instruction and optional input provided.### Instruction:
Classify a given piece of text into a specified emotion.

### Input:
I can't believe this happened

### Output:
This text could be classified under the emotions of shock, surprise, or disbelief.