Q: "A young boy sitting on a rock pile." Does this mean that "There is a sitting child."?
A: yes

Q: "A woman is staring at a vending machine trying to make a decision on which item to choose." Does this mean that "A woman is indecisive on what to buy."?
A: it is not possible to tell

Q: "A man with a red bowtie singing a solo with a full men's choir in the background." Does this mean that "a man is nervous"?
A: it is not possible to tell

Q: "A young man sits on the curb while another rides a skateboard with green wheels down the street." Does this mean that "A young man waits for his turn on a skateboard."?
A:
it is not possible to tell