Verb + preposition (at)

Look at
Why are you looking at me like that? Am I so ugly?

Have a look at/take a look at
Have a look at this picture.

Stare at
Sean is staring at me.

Glance at
Seeing she glanced at her watch, I knew she wanted to go back home.

Laugh at
I look stupid with this haircut. Everybody will laugh at me.

Aim something at
Don't aim the gun at me. It's so dangerous.

Point something at
Don't point that knife at me. It's so dangerous.

Shoot the gun at
He's shooting the gun at the birds.

Fire the gun at
He's firing the gun at the birds.