Watch out for the louminous piss!
I got some eye drops one time that enabled me to hock up bright yellow spits.
I'm talking silly putty luminous yellow now.
They almost had the consistency of silly putty too.
I was so amazed that even though normally I'm not a huge spitter, I spent the next while walking back home going 'hoooooocccchhchhh thua.... fucking eh!'
Without doubt one of my finest hours.