I am travelling tomorrow and was hoping to take my Boheme Marron along.. What do you advise me to do?

i.e. throw out the cartridge before taking off (is that enough?)? Throw out the old one and put a new one in?
Can I just do nothing and keep the pen upright in my jacket pocket during the flight and hope for the best? How do Boheme(s) usually react on flights any experience?

Thank you