You shouldn't approach a stranger's campsite unannounced.
John is using the facilities in the middle of the night at a National Park camp site.
John wants to find his campsite.
John remembers what number campsite his tent is at and makes his way quietly back to it while avoiding other's campsites.
John approaches the first tent he sees and attempts to open it thinking it may be his.
All the campers at the campsite are able to sleep as they go undisturbed by John.
The occupants of the tent scream in fright and freak out that a stranger is trying to come into their tent.