Flying can cause the ink to come out (happened only once with me). Otherwise, ink shouldn't come out unless there is a flaw in the pen (which many ultra cheap

Flying can cause the ink to come out (happened only once with me). Otherwise, ink shouldn't come out unless there is a flaw in the pen (which many ultra cheap pens have). I've not tried the Moonman, but Jinhao/PenBBS are solid for me. Rarely do they "leak".