Ah, good work, Smee.
One error, however:
It wasn’t a happy smile, but an insane smile as the fear gripped him, like nervous laughter.
~~~
I'm pretty that the last comma is unnecessary.
Poller: I disagree. I think if you took away the comma, the "like nervous laughter" would be describing the fear, rather than the way he smiled. I might be wrong, though, I'm not good with grammar. But that's the way it would read to me.