Answer:
Hearing something unexpected or touching a live wire can have this effect.
What goes up when the rain comes down?
Sally's mom has 5 children, Boby, Jimmy, Franky, Marly. Who is the last child?
I have joy in bringing two together, but darning my existence! My life hangs by a thread, filled with ups, downs and resistance!
What starts with a P, ends with an E and has a million letters in it?
It is something you will never see again.