An exclamation symbol in a square speech bubble. 

Speech Bubble With An Exclamation Mark

Exclamation Mark

A round speech bubble with punctuation marks: an interrogation mark and an exclamation mark. 

A speech bubble with an exclamation mark.

A round speech bubble with an exclamation mark.

An exclamation triangle and two speech bubbles with three dots and a question mark next to an exclamation point together.

A speech bubble with an exclamation mark in it.

An exclamation mark and a hashtag inside a tilted rectangular speech bubble.