i shoot the shit in the back of my throat for the simple fact whenever i do an IM shot with winny it tends to hurt like hell most of the time...so for future doses, just drink the shit..but be careful, it tastes like ass...as far as your quad goes, lean or not, you definitely have to shoot a minimum of 1", preferably 1.25" to have a good IM shot...and as 8and20 said, you might of hit a nerve which is why i don't fuck with quads...all ass and shoulders for me...but definitely watch the site for infection and for all future injections, have SOMEONE else who knows what they're doing, do it for you...and the reason i say this is because anyone who knows what they're doing, won't shoot a 1/2" needle into their quad!!!