With a flush and a swirl, my toilet, like so many other toilets, does exactly what it should do with one exception...it sounds like it is a space shuttle ready for lift off.
This is a new development in our bathroom. It started out as a low hum after the prior mentioned flushing and swirling occurred. It is a combination of a rumble with a vibration. It gets louder and louder with each flush. When I am laying in bed and I hear the toilet flush, I later see the results of the flush...my wall begins to shake.
At first, I didn't really notice it because we have the R100 train in in our backyard and we've gotten quite used to that rumble, but this is a crescendo of a flush. Right near the end of the flushing cycle, I start to believe that the toilet might just explode. Maybe I should call someone about this.