I had a 10 year old B/A school last year who has Apsergers. His reactions were similar to what you described. A little bump from someone was exaggerated into something more. You could not startle him or sneak up behind him. It upset him greatly. He was a sweet boy but I had to term as he was getting more and more upset by my daycare crew. He would complain about the noise (my crew has learned about inside voices...but sometimes being toddlers and preschoolers..it can sound like...well..a daycare he would get upset if one of my dck's sat to close to him. He was always "bored".

His mom wanted him to stay as it was a great location (his school was across the street) however, I felt he would do better in an environment with kids his own age. Coupled with the fact that we weren't a good fit for him. The kids made him nervous and he always wanted his own space (my den that doubles as a secondary play and music room).I hope she found a great afterschool program for him.