Playing alone at PUBG make you very nervous !!
Mostly when it comes 1 on 1. Your survival instinct to kill the enemy has been trigger.
You try to think or cope up of a better idea how to kill the enemy. If you will wait for the circle go small or just camp and wait for the enemy to stop.
For me I always carry sniper gun if I had find one and always use it in that situation. I will steady my aim and shoot the enemy at the head. Sometimes the best option is shoot it to the body so you don't miss.
How about you?