Steve’s looking incredulous.
These two words are often confused.
INCREDIBLE means difficult to believe:
Jumping from a plane at 25,000 feet without using supplementary oxygen and landing alive seems like an incredible feat; yet a man did this not too long ago.
INCREDULOUS means unable or unwilling to believe something:
If I had not seen the video myself, I would have been incredulous if someone had told me a person had jumped from a plane at 25,000 feet and lived.