Maybe
no
Take him to the vet as soon as possible.
sort of it doesn't look very real, but it is possible
Yes. It is occasional, but it is possible.
No, but it's possible to have a heart attack or seizure.
Yes, by the person falling down and/or thrashing around during the seizure, broken bones are certainly possible.
Unfortunately, yes, it is possible for a young dog to have a seizure and die either during the seizure or just after the seizure is over. You need to take your dog in to be seen by your Veterinarian. Medications can be given by your Vet to control the seizures. Each time your dog has a seizure, brain cells are destroyed. Take your dog immediately to a Veterinarian.
It is not possible to catch BV from eating chocolate.
I hope you didn't decide to taper off the medication without medical supervision. There may or may not be enought med left in your system to control a seizure, but probably not. If you're at risk for seizure you shouldn't be discontinuing your seizure med :-)
It is very rare for someone to die directly from a petit mal seizure. Petit mal seizures are typically brief and do not result in physical harm or complications that could lead to death. However, if a petit mal seizure occurs in a dangerous situation, such as while swimming or driving, there is a risk of harm or death from accidents related to the seizure.
To control anything during a seizure is not really possible, so you could not consciously do it. You could wear some protection in your mouth, but that isn't very practical and you don't know when a seizure will happen. It can also be dangerous having something in your mouth when you have a seizure as you could do other damage, like to your teeth. So there is not very much that can be done to stop yourself biting your tongue when you have a seizure.
It depends on the type and severity of the seizure. If the seizure state is one of status epilepticus (continuous, unended clonic-tonic seizures) that interferes with cardiopulmonary activity, then it is possible to die from that kind of seizure.