Something similar happened to me a few years ago. I used to work in a hospital and at the time I had torn some ligamints in my ankle from a sprain and was kind of limping. Anyway, there was this really long hallway I was walking and carrying a box. Out of nowhere some one snatches the box out of my hands, and that freaked me out, why would some one steal a box they don’t the contents of. It took me a few seconds to process that the guy was helping me. So he slows down his pace to match mine and walked a bit in front of me without uttering a word! I just thanked him when I got to my turn and never saw him again.