Next person has at one point or another sucked up a bunch of crap infested dirty water which ended up in his/her mouth, from a bad siphoning experience.
Wow, I answered too late. So now I have to change my answer to True!!
I've swallowed fish yuckies, before I learned how to properly work my "self-starting" siphon. And my cat have eaten fish that have jumped out o the tank, does that count?
The next person has to work tomorrow, even though it's Saturday