You've been framed

This story was told to me, by a friend of mine Mike Payne,
 
The other day I went to a care home and as I started walking down the corridor I noticed an elderly lady coming in the other direction. She was in her own little world creeping along, carefully lifting up her Zimmer frame and slowly shuffling forward a few steps at a time.  As it was going to be a bit difficult to pass I stepped back into the entrance hall to let her through.  After a few seconds she looked up and saw me standing there.
'Oh are you waiting for me?'
'Yes but don't worry take your time.'
At which point she lifts up the Zimmer frame and scoots down the corridor, unaided. 
'Thank you dear'