Yikes - looks nasty, hope you're all right for your trip!
Desks are definitely dangerous workplaces. One place I worked, I saw a colleague drop a pen and it rolled under the desk; on picking it up she hit her head on the underside of the desk, prompting the floor first aider, then the H&S rep, then, as she was feeling dizzy, an ambulance, and finally ten weeks off work followed by a phased return over several weeks. And they tell us we should wear helmets for cycling!