An exclamation symbol in a square speech bubble. 

Speech Bubble With An Exclamation Mark

A round speech bubble with a dollar sign.

Speech Bubble With Dollar Sign

Three square speech bubbles with a down arrow, two exclamation marks, and a percentage sign.

A speech bubble with an exclamation mark.

A round speech bubble with two exclamation signs.

A round speech bubble with an exclamation mark.

A tilted blocky exclamation sign inside a square speech bubble with curved edges.

A speech bubble with an exclamation mark in it.

A round speech bubble with an exclamation point inside it.