Only one hand touches the fire line, and other parts of the body are insulated from the ground, so there is no danger of electric shock.
Because there is no circuit to the ground and no current flows through the human body,
You should know that this is the principle of electrician's live working. One hand touches the live wire pin, and the other hand is insulated from the ground.
In fact, electric shock is not so terrible. As long as you are brave and careful, there is no problem with insulation.
I hope I can help you.