Is there anything out there that is not illegal yet fun to rail? For more recreational purposes rather than tripping.
i sometimes crush up no-doz and rail that out of sheer boredom, and because i often get the urge to snort things. it's fun. *shrug* also painkillers..
kanna maybe nasal snuff, but i've never tried it (dry ground tobacco, often scented, intended to be used as snuff - the original snuff, in fact)