Strokes are never good, but here's a way to mitigate damage by seeking help fast. Victims often know something is wrong but have trouble communicating verbally. Or you might see someone acting oddly or clumsily. Doing nothing or making a cute comment rarely helps; instead...

Click the adjacent image; when the larger version appears, right-click it and save to disk. Now print it, fold it (glue it together) and put it in the topmost plastic insert of your wallet or the wallet of a loved one. Train them and yourself that in the event communication is difficult a stroke is possibly the reason. You/they should show the message to ANY passerby (pride, vanity and embarrassment will not save your life; action might).