How to avoid smashing your face into a rail?
I'm reasonably new to snowboarding. Recently I started doing 50/50's on boxes and T-rails, which is going really well, but yesterday I almost broke my nose because I smashed my face onto a box. Just as I jumped on the box, some skier decided to fall right at the end of the box (he came in with high speed from behind, I was in front of him at the moment I jumped on the box so I couldn't see him coming) and not get out of the way. Ofcourse I didn't want to land right on top of him, so I decided to turn to the side of the box and jump off, but my board slipped away under my feet and I ended up smashing my face into the box. Fortunately I was wearing a helmet, if not I might have a had a severe concussion right now.
This accident wasn't really my fault, if the skier didn't block my path I would have been able to finish that box with my eyes closed (not literally ofcourse), but I know that if I'm gonna do more boxes and eventually rails, I will inevitably fall in a similar way, possibly with a less fortunate result. Is there anything I should know about falling safely on boxes/rails? Are there any measures you can take to not smash your face into a box?
Thank you for your time, and I apologise for my bad English ^^