I was in PIT and we had called for a wheelchair for an older lady. I called again on the ground, and then once more after the FA told me that it hadn't come yet. I went up to the gate agent to see what the holdup was and the gate agent said, "I've called 'em, but they aren't here yet." I pointed to a wheelchair about 15 feet away and said, "How about that one?" Long story short I went over and got the wheelchair for that dumb@ss and got the poor old lady off of the sweltering plane. His lack of braincells rivaled a 30 year meth addict with Alzheimer's.