What this monster movie call?

I'm trying to remember this movie I seen as a kid on tv, all I remember of the movie is that the monster look like bigfoot but its fur was black and it didn't have fur on it chest with a ape or demon face and there was a sense where a family was visit at a graveyard(I think) where the dad, mom and daughter gone in the graveyard and the son stay in the car and the monster got the son, and the dad couldn't save the boy, and there was another sense where two guys were driving and talking and the monster jump out, roar at them and they was driving away and one guy said that there was no way it could catch up to them and well caught up to them and it push the car over to flip it and killed them, and at the end the only way to kill it was to get it to fall in a pit or grave. Okay that all I remember about the movie please help.