Probably nothing, besides a few thousand sewer busts, lots of stincky gloop of everything that, well you get the picture. Don't you? If not, sorry. I hope that this answers your question. If not, sorry. Do not try this unless you live on high ground. The people on the dark side would lose some sleep. The earth would suddenly be deafened by a great noise: half the population of the earth would yell at the other half "be sure to put the seat down!" I don't think anything would happen, except for the momentary drop in water pressure as the toilets refilled. BTW, not every culture uses toilets that flush.
Everyone will die.
everyone would die
Earth will have day on one side and night on the other and everyone will die.
Since everyone and everything on Earth does so anyway, nothing.
Everyone would die.
Lefty's would rule the earth.
Everyone on earth would drown.
everyone would DIE! surely..
If everyone on Earth jumped at the same time, the impact would be very small and not noticeable. The Earth is so massive that the force of all the people jumping would not be enough to cause any significant movement or change.
If everyone on Earth jumped at once, the impact would be very small and not noticeable. The Earth is so massive that the force of all the people jumping would be insignificant compared to the planet's size and mass. The Earth would not move or be affected in any significant way.
We would need 4-5 earth`s to live on !
all girls places. Such as toilets marked "ladies"