[privong]

To be honest, I haven't really tried that, so I can't say for sure. I usually carry mine clipped to my shirt or sportcoat pocket. The only time I had an ink leakage issue was when I dropped it from about stomach-height and the ink reservoir came slightly loose and there was some leaking a few days later. So now I just give it a quick check if I've dropped it, to be sure nothing came loose. I've dropped it more than once, and it's only had a problem that one time.

I have also flown with it numerous times. I have the ink convertor, and I squeeze out the air (or make sure it's full of ink) before I fly, and have had no problems. I have even written with it in-flight, without issues.