#1 Problems during playing

[ntselas]

1.While you are driving your vehicle if you turn the
wheel abruptly and you flip over the
car you can see ,through the floor, the space. Is this
normal?
2. If you flip over again the car while you are on an
elevated road you can see through
the road and you can shoot the enemy (the bullets pass
through the road). This does not
sound realistic. Is it?
3. The lights can be seen through the walls and through
the elevated road. In reality the
walls are supposed to be opaque?
4. If you stop in front of a human, while he's
walking, he can flip over your car in
order to continue his movement. Why is this so?
What could have caused these?
I will appreciate if someone can help.