Head-On

I'm sure this is something no one wants to see, someone coming right at you! Athough, this is how many duels were fought during the First World War. You would see 2 planes that would come at each other head-on, and the first to flinch or pull out was summarily shot down. If neither flinched, they would both die, embedded in each other's cockpits. Needless to say, it required pilots to be either brave or stupid. You can make you own judgements as to which one.