I know I've dealt badly with this before, but I really realised today, I cannot cope with him crying with frustration. I get really really angry.
I didn't hit him, but I did get shouty. Oddly enough, this didn't help him calm down.
How do I stop having such a strong bad reaction to this? I realise, logically, that he if he's upset about this sort of thing, he needs (and deserves!) attention, patience and a hug. How do I keep myself from getting angry?