The lesson to be learnt is to watch your veil against your face!
It is so important to make sure that the veil is kept clear of a beekeeper's face. In my experience there have been occasions when bees have been feisty, even though they have been placid on other occasions.
Perhaps this discussion thread should include comments about experiences and/or recommendations about different styles of beekeeping veils.
The bee-suit which I bought has a round hat with gauze/net which extends downwards from the rim of the hat, and connects with a wire loop of the same diameter at shoulder level. When I first started to use this suit, I found that it was possible for the veil to touch the skin of my face in some situations - and the bees discovered this too!
There were also a couple of occasions when bees managed to get inside the veil as well. On one occasion I actually had two bees walking on the inside of my veil, but thankfully I was not stung, and was able to get away from the hives to be able to get the bees safely removed.
The reason why I am telling this story is that after these experiences I did some thinking about how to prevent these kinds of problems.
I made an additional wire hoop from thin spring-steel wire, and stitched it to the inside of the veil, about half-way between the hat-rim level and shoulder-level (around about the level of the tip of my nose). This has been entirely successful in keeping the veil well away from the skin of my face - in fact it is now difficult to even deliberately press the veil against my face.
The other problem, of bees being able to find a way to get inside of the veil, has also been solved (at least it has up till now!). There is a flap which covers the spot where the zips meet up (near the throat, under the chin). This flap is held down by velcro fastening strips, but I found that these strips were only on the sides of the flap on my bee suit. There was no similar velcro along the bottom of the flap, and it was possible for bees to crawl through this small space. I have sewn in additional velcro to completely close the bottom of the flap against the suit, and have not had any further problem.
On a recent occasion, when I had hundreds of bees flying around my head, it was rather comforting to have the confidence that bees could not get to my face.