Is this somehow related to feeling uneasy from skydiving once parachute is deployed as well? I sometimes feel like I am going to pass out. I had a scary situati

Is this somehow related to feeling uneasy from skydiving once parachute is deployed as well? I sometimes feel like I am going to pass out. I had a scary situation while practicing multiple tailspins and free-falls on a sailplane and almost blacked out after the last one (basically couldn't feel anything and landed just by vision and mechanical yoke movements I couldn't feel at all.