Yep. I've done it. Hurts.
Other interesting things I've tried:
(Warning: Trying any of the stupid things I've done might cause nausea, dizziness, fatigue, excitability, headaches, throataches, noseaches, shortness of breath, skin turning green, death, a fate worse than death, voting Green Party, eating White Castle, alien abduction, turning into Jimmy Hoffa, or pregnancy.)
1) Dripping e-juice under your tongue when you need that extra nic hit. Verdict: Works, but stings with 36mg juice. Don't swallow, or you'll have a nasty case of the hiccups.
2) Getting e-juice in the eye(accidentally). Verdict: Hurts. A lot. Don't do this. Got one heck of a rush, though.
3) Mixing a little coffee e-juice in with the morning coffee. Verdict: Works. Don't use a lot, trust me.
4) Soaking a little bit of cotton with e-juice and use it in the mouth like snus or chew. Verdict: Hurts. Don't do it.
Wow my friend... You have bigger balls than me!