Stroke recognition - save a life

I received an email recently with a simple exercise to check if someone has suffered a stroke. Remember STR, the first 3 letters of "stroke":
S = ask them to "smile" and then to stick out their tongue. Check for lopsidedness.
T = "talk", get them to repeat a sentence for you such as "it is sunny out today"
R = "raise" both arms.
Both of my parents-in-law died from strokes, so this information is valuable. Normally I focus on prevention and product-related information but thought I would record this useful tip for others.