go to pieces
To become very nervous or sick from nervousness; become wild.
"Mrs. Vance went to pieces when she
heard her daughter was in the hospital."
(Mrs. Vance became very nervous when
she herd her daughter was in the hospital.)
"The man went to pieces when the
judge sentenced him to life."
(The man became wild when the judge
said he would have to go to prison for life)
Mary goes to pieces when she can't have her own way.
(Mary becomes wild when she doesn't get what she wants)