The use of the triple dot can come in very handy, I've found.
For example, Shock/horror/suspension can look like this:
The blood...
It was on the walls...
On the floor...
Around the body... And a limp hand... was lying on the soaked wood floor, the sleeves drinking up every last drop they could.
By doing this, it's like a camera panning around the scene, picking up pieces of an event already done with, leading the readers forward, closer to the main focus.
Waiting with abated breath/silence/inability to hear someone:
I leaned in closer to the crack in the door.
"Didn't you say Annabelle was your worst enemy?" Katherine tittered between laughs.
I gasped at the door. Me?? Somebody's enemy!?
Unheard of.
Quickly quieting myself, I leaned in again.
...
Why weren't they saying anything?
...
Were they whispering?
...
Finally, I heard the telltale snickering from the ladies of the court and determined that, yes, they'd just whispered something nasty about me between themselves. I tsked and turned around.
Who needed them anyway?
You can also use it for breaks in a conversation over a phone:
"Don't you think it's strange that..."
I put a finger in my ear and walked around the room, trying to get better reception. "Carl, I can't hear you!" I shouted into the crackling phone.
"I said, Shelly isn't..." he cut out, "and the mailman... The mayor couldn't think of anything to say so I just... and google maps certainly won't help... best dang muffins I ever... Am I right?" he laughed.
I could not make heads or tails of what Carl was saying. When had the mailman gotten involved!? Did he know something I didn't?
"Carl, I'm gonna call you back, I—"
"WHAT!? I can't hear you!"
"I said I'll call you back!!"
These are just a few possible uses of the triple dot, and I'm sure there's lots of other ways to create rhythm in writing that don't involve it, but I hope this helps. :)