Angels anyone?

Just wondering if any of you have experienced angels? I remember taking a corner wrong on my bike and nearly coming off, I braced myself ready to hit the road and my bike suddenly went upright again and I carried on riding!
A lady from our church who was ill at the time was shopping and a smartly dressed young man offered to carry her shopping to her car, when they arrived she turned to thank him and he had totally disappeared! I've heard so many similar stories, any of you had similar experiences??