Is this an example of a simile or no?

"He faltered hard for a word, and screwing his hand round and round as though uncorking a bottle."

Yes, this could be an example of a simile.

Explanation:

This could be an example of a simile since similes normally have the words "as" or "like" involving a comparison of one thing with another thing of a different kind.  This phrase contains "as though uncorking a bottle," it's comparing the movement of a hand to uncorking a bottle.

don't come near me, i might sneeze on you

explanation:

you can use this site to summarize your ideas, exotic animals do not make good pets.