I have never had the opportunity to really work with mules - they are rare in the UK so, when a farmer neighbour had two I jumped at the chance to try!
Having listened to a lot of mule people I knew they were different. One of these was reasonably friendly the other not so. Catching was a problem so it was into the paddock, good book and time. Took 2 days before he came and actually sniffed me, ate a couple of apples I had put near me. I got up and walked out.
Day after I had just got to a good part in the book and he was over to sniff me in about two minutes.
Within a week I could catch him without much problem, he was extremely wary of most people but accepted that I meant no harm. The other was less so and was leading about no problem.
Unfortunately I then had a couple of weeks holiday and when I returned they had been sold.
Listening to people who have worked with mules I knew I had to let them decide I was safe - try to force things and I would have lost.
I still want a mule! I want one I can take out Fox Hunting - just because from all I have heard they fascinate me.