Snorting - Heroin snorting dosage

[Sauroth]

Swim got some free Heroin off a friend. Swim smoked very small amount on tinfoil made Swims heart beat hard and a little fast (not sure if it was because swim was kind of freaked out it being his first time, didn't do that that much, a few small puffs) was kind of high Swim thinks but was probably a reaction with the .25 mg clonazepam he had taken 5 hours earlier (swim was being careful maybe smoked too little to get high at all maybe wasted it smoking it improperly), didn't feel like opium poppy tea. Anyway Heroin is slightly tan white (looks like coke in bumps) and Swim wants to snort some friend said it was very pure he put a small amount in his mouth and his tongue went numb then he nodded for hours and kept kind of jolting awake (didn't fall asleep) not sure if he swallowed it or if he ingested it through the mouth or what. Amount was the size of maybe 1-2 small crack rocks. Swim wants to know if a match head size is too much to snort. Swim also wants to know what Swim stands for other then swimming in a pool.