I am very short, and sit up rather straight. My head hits what should be the most comfortable parts of every kind of seating in the most uncomfortable way. This is an accurate representation of the sensation, when curved neck portion ends up at top of your skull, and doubly so, if it's a bucket seat. Special cushions help, in certain vehicles, which can also alleviate the seatbelt going practically across your throat. Our old Outback is tolerable, which is lovely.
We have a couple IKEA Poang chairs at home, and I need to make pillow booster-seats for the damned things, or it's just this image, lol