I have warned most of my fishing buddies!!! That if they play a trick on me by putting a snake in my tackle box or lunch box, that we will no longer be friends, but that I will visit them in hospital once just to tell them "I told You so" Hopefully they will be out of there coma so I am sure they understood me.!!!!
I usually tell them the story about my co-worker that put a frog in my lunch box, on the first day of that job after seeing that all the guys were jokers, I warned them that I have no problem taking a joke but that my Lunch was off limit. That job was a very physical one and I needed my lunch for fuel.
One day at lunch I open my box and there is a frog in my lunchbox.I am french and for some reason that's the nickname they gave me(very original) So I look around and the guy across the table from me has a big grin on his face . So I reached over grabbed him by the collar and just walloped him one . Both of his eyes were black by the time he hit the floor. All the big bosses were sitting at that table with us, but my immediate boss got up and said that everybody were warned on my first day not to F&%K with my lunch and he showed them the frog in my box and said "Seems like this guy didn't listen.