Identify the mood of this sentence.
He felt so ecstatic when he saw the results of the experiment.
The mood of the sentence is joyful or elated.
Complete the following task based on the instruction and optional input provided.### Instruction:
Identify the mood of this sentence.

### Input:
He felt so ecstatic when he saw the results of the experiment.

### Output:
The mood of the sentence is joyful or elated.