Don't try and attract attention
From Create Your Own Story
You don't make any noise, realising that no one will hear, and you will most likely be bound tighter. He continues to ride the cart further down the road.
He then comes to a sudden stop. you wonder why this has happened. You then discover that there is a roadblock on the road and they have stopped the vehicle that you are in - you do not know why they have stopped you however. They are obviously inexperienced because they don't search the cart well enough to find you. As you are about to leave the roadblock, you wonder if you can try to attract attention again. This will be your last chance on this trip to make noise as there is nowhere for bystanders to walk, so there will be no one's attention to attract. Of course, there is the chance that the lawmen won't hear the attempt.