most likely you'll start bleeding...alot!
You will feel pain.
Well you know you wont hit a vein when the piercing is done by a professional body piercer working in a licensed and inspected facility. Don't mess with things you know nothing about, leave the piercing to an experienced professional.
You won't have that problem if you go to a professional.
Yeah go to a shop to be safe , or somebody expierenced.
I am going to assume you did them yourself and the piercing wasn't done by a professional body piercer, there fore a vein was hit while doing the piercing. That is why it is bleeding.
Properly done ear piercings don't bleed. You have hit a vien.
Unlikely, although hitting a vein does increase the chance of an infection.
yes
You are still at fault, no matter what.
If the piercer hits a vein (this would be due to an error on the piercers part, lack of attention to what he/she is doing) the piercing will seep blood. This is not a good thing but much better than the piercer hitting and artery which will pump blood with little sign of it stopping. This generally require a trip to the hospital to have the piercing cauterized to stop the bleeding. So before you run into issues find a good professional piercer and do your research!!
they hit the ground while farting and screaming at the same time
Well if you are piercing your self hitting a nerve should be the least of your worries. The chances are better that you will screw up the piercing or contract an infection by doing it yourself. Leave piercing to trained professional body piercers and then you will have not worries.