In my case, since 90% of the game is seen through the MC's PoV, I don't show his face if it's not absolutely needed to avoid breaking immersion. I only animate faces (blinking, i.e.) when there is only a character on screen.
I haven't been in Pamplona's Running Bulls, since it's too massified. I have family there and when I was young(er) they always told me to go there for San Fermin (the festivities name), but I never went.
I have been in other smaller ones, and it's a bit chaotic. Locals know you can't outrun the bulls for the whole race, so people usually run for 100-300m, but tourists (like I would have done if my Pamplona cousins hadn't explained it to me) want to run from start to end, and they are the true danger for other runners.