Thank you for helping me yesterday. I think you felt shouted at, at one point. I did not intend that and I apologize.

It is frustrating to me that I cannot talk. I react with frustration. I also find that angry enunciation can be more comprehendible.

It is easy for me to say 'Don't take offense,' but I hope to convey that I mean to give none.

By the way, the reason that the chair would not go is that moisture on the drive mechanisms disables them.