Just discovered this great forum and thought I'd share some stuff!
I don't think any of these have been posted yet.
Girl has an accident on a zip-line thing (hope wetting is allowed in this thread, I couldn't see another suitable thread)
http://www.youtube.com/watch?v=RChifFRA-NI
Popping a squat by a car
http://www.youtube.com/watch?v=AEgdjvJa1l0
Girls peeing in a drive-thru
http://www.youtube.com/watch?v=vbzxgpfDkWA
Girl pees herself waiting for the toilet to be free.
This is a really great vid, I'll upload it below
http://www.youtube.com/watch?v=w6G02BTzHkA