Anyone who reads this should not hesitate to evaluate and get someone to the hospital if they suspect a stroke, if only so you do not need to listen to them singing later!
https://www.stroke.org/en/about-stroke/stroke-symptoms
F.A.S.T.
F = Face Drooping – Does one side of the face droop or is it numb? Ask the person to smile. Is the person's smile uneven?
A = Arm Weakness – Is one arm weak or numb? Ask the person to raise both arms. Does one arm drift downward?
S = Speech Difficulty – Is speech slurred?
T = Time to call 911
Thanks for all these interesting medical articles you post. We never know when we might need the info filed in the back of our mind.