I don't know if certain events foreshadow the horrifying events which historically unfolded in the trials, however Arthur Miller brilliantly characterizes in the play what crazy lengths people will go to save themselves.
Abigail wants revenge and quickly learns that if she is "one of the afflicted" she can gain the status she needs to win back John Proctor. Tituba quickly learns the game as well--names names and your life will be spared. Parris won't admit to catching the girls dancing in the woods because he won't have his reputation tarnished...the parrish brings in "experts" who turn it in to a political power struggle...the list of hypocrisy is endless...
The sane people in Salem see and understand what is happening. The irony is that the people who are in power or trying to gain power are the ones making the decisions. This is what is truly scary about the events that unfold.
In the first act in the play "The Crucible" the reader learns that John Procter has cheated on his wife with a young girl/woman named Abigail. Abigail is still in love with Procter and unhappy about his intent to distance himself from her. She wants him to be rid of his wife.
When Procter does not get rid of his wife, Abigail sets the tide for a witch hunt by accusing and testifying against John's wife. The foreshadowing of the people believing in the words of a young girl and her accusations is a prelude to the witch hunt that will take place later in the story when the other girls become frantic in their allegations towards others in the town.