Are you brain-crippled?

The other day I went shopping with a friend of mine. My friend went to get the car. While I waited, an old woman with a walker came up to me and said "So you are crippled too, huh?"I didn't answered because I was so in shock I couldn't speak. I should have said "I'm not crippled but I see you are brain-crippled." You always think of the best answers after the fact. Then she said "So what happened to you? Polio?" Did we just went back 50 years and no one told me? Do people get Polio anymore? Entiendela Senor que no sabe lo que hace.