here is a link to towerhobbies grape scented additive.
http://www2.towerhobbies.com/cgi-bin...?&I=LXERH2&P=7
why do ppl do that? Some ppl like the smell of grapes and cherries better than burning nitro and castor oil.
***edited in below***
they also have other scents
http://www2.towerhobbies.com/cgi-bin...p?&C=PFE&V=PAR
coconut, cotton candy, bubble gum, rootbeer, and of course, cherry