Answer:
Robin as a young boy worked at the circus with his parents as high
flying flippers. Bruce Wayne often visited the circus and watched as
everyone watched the boy and his parents fly through high levels
on poles.
A character supposedly the antagonist known as Zuckoff comes for
trouble with two henchmen confronting Tim's (Robins) parents of
a deal for money. Tim and his father both refuse the offer and fight
with the two henchmen as Tim dials the police.
Meanwhile Batman appears and breaks up the fight. Before Zuckoff
disappears him and Tim exchange menacing glances. Tim from that
point worries about the incident. later when the circus opens its late
show Tim and his parents prepare for their performance as Tim
confronts them of his bad feelings.
As his parents first jump on up and do their moves for the excited crowd
Tim is once again happy. the next scene automatically shows Zuckoff and
his henchmen who question him why they are there to watch the show
which he automatically holds out his hand to reveal iron screws. The next
scene after that depicts Tim about to jump to until he notices that the top
shaft of the tight rope bars is about to drop and suddenly looks to his
parents about to grab him as they suddenly see what is about happen.
The tight rope unleashes and as the crowd along with Bruce Wayne
watches Tim's parents fall to their death.
From that point on Bruce feels bad for Tim and adopts him. Tim
eventually discovers Bruce's secret and becomes Wonder Boy
better known as Robin.