A rider on a running horse is thrown forward when the horse stops suddenly due to inertia of motion. When a person jumps out of a moving house, he falls forward due to inertia of motion.
If someone's car ran out of gas and they tried to push it and, because the car is much heavier, it would require more force to push than if it was a lighter object, like a bicycle.
Newton's 2nd Law
Newton's 3rd Law
If you ever played with the water rocket, you will see water pressure that contains detergent in a high state, then when the water rocket cap opens, there’s an action in the form of water burst that bursts downward