What does Rolo have?

Question
Rolo, my sister's ball python has been acting weird. Now I've found him making "gaaaakkkk" noises, having seizure like spasms, and spitting up pink liquid. He has a bump on his body w/ discolored under scales. Help me!!
I think he's dying!

Answer
I too believe your snake will die unless he gets immediate veterinary care.  SOunds like a systemic infection (respiratory infection) as far as the pink liquid and hacking.  As to the bump-I couldn't really even guess w/o seeing it.  Either way he probably needs antibiotics and the only way to get them is from a vet.  Good Luck!