We used to have an issue with the NICA team getting stings as the first in a group would hit a nest and the remainder of the group rides through the angry yellow jackets. Once of the coaches even bought bee stickers and give the kids when they got stung. A couple incidents stand out:
1. Core Creek, Woodbourne Loop. Short loop, 3/4 of a mile, that we would do hot laps on. There was a log about 0.1 backwards into the loop that had a nest. We have 30? kids on the loop, coaches mixed in and I am at the start/finish. Fast kids come whizzing by for a lap and at some point I hear screaming on the radios. About mid pack kids start getting stung. Mind you 30 kids are spread-out and we make the call to get everyone back to the start. That plan was great until one kid turns around and starts sprinting backwards on the course as he is deathly scared of bees. Unknowingly he is going towards the areas with the bees. While he didn't get stung, dude got out of dodge and disappears. Spent the last hour of practice searching for said kid after attending to 15 kids with stings.
2. Nesh, surfer, which is a short but fast DH singletrack section. I am with the faster kids and come down the trail and are regrouping at the bottom. It's taking awhile and I start to wonder where the second half of the group is. Enter screaming on the radios and kids screaming in the distance. I start to backtrack and every kid has stings but one girl has multiple. So one, she thoroughly embarrassed all the other kids in the group (8th and 9th grade boys), by taking off her jersey (she had a normal sports bra on) for us to tend to the stings with sting wipes and then I am like "where is your bike?!". To which she responds, I dropped it and ran. So guess who needs to get it. When I found it she basically threw it down the hill side, so I had to climb through a bunch of prickers to get said bike and got stung in the process. Good times.