What happens to the spider?
Do you care?
As long as it doesn’t come back and get you, you probably wouldn’t worry…
But, what really happens?
Well, the answer depends on where your toilet takes it.
Does it go in a sewer? If so, it’s in for the ride of its life. The expectation is that the spider will die quickly, or get smashed against the pipe repeatedly (you ever see the Hulk smash scene?). Either way, it’s likely to survive.
It will die a horrible death, and eventually become food for other insects or animals.
Now, if it’s dropped into a Latrine:
Well, it could survive. It could thrive. It could come back to bite you in the ass.
But every spider is different. And the gas and waste will work against any 8 legged creature. Not to mention the cockroaches will put up one hell of a fight.
So if you’re worried it will pop back out of the toilet and get you… It could. Anything is possible. But happily, the odds are too great.