Just be careful you don't hit a vein when IMing; whereas 30mg IM is a pleasant euphoric trip, 30mg IV is a rollercoaster ride to terror (10mg IV will make anyone sit up & take notice). Needless to say larger doses put straight into a vein are the sort of thing that can have long lasting psychologivcal consequences - there's a report on Erowid of someone accidentally putting an IM shot of 80mg into a vein and it sounds like the sort of nightmare no-one should have to endure.