It depends on the flushing system you have. Here there are 2 toilets, one spins clockwise, the other one counterclockwise.
You should get a plunger stick it in the toilet and hold it in there till the water slows down and if that doesnt work close the toilet seat and wait til you hear a dweeling sound that means the water is going down.
No.... because that's just the sound of the water going down the hole and new water coming in its just how a toilet works
Water and waste
Most Americans use 5 gallons of water per day. That's a lot of water, most of it going down toilet and shower drains.
It all goes to the same treatment plant and is sent down stream to the next town or city. All tap water is the same, sink or toilet.
I have seen a whirlpool near a cliff. When the water goes through a hole in the cliff that is underwater the water spins like what you see in the toilet or going down the drain in the tub.
This depends how you are perceiving this "pressure going up and down" . I've repaired and replaced toilets for years and couldn't imagine how I'd gauge pressure doing this. Maybe you are mistaking pressure for flow rate and something is plugged up somewhere in your toilet.
If the meaning behind your question is "does the water go clock-wise or counter clock-wise down a sink or toilet" then the answer is, it depends on the design of the sink or toilet, try this yourself, fill a sink up, pull the plug, when the water is going down (say clock-wise) swirl you finger in the water counter clock-wise and the water will go down that way, proving that it does not matter.
so you dont take water from the toilet and adulterate or otherwise water down the urine sample
Is the toilet on the second flore? Do you have a dog?
Sadly, yes they can! The toilet is much bigger then them and they can fall in their poopy water and drown. If they get flushed down who knows where they go! maybe out the plane!
100 Galen