The German Pilot (Situational Irony)
Blake risks his own life to save the German pilot from the plane he crashed, yet the German pilot immediately stabs Blake afterwards. This is a tragic and ironic twist on Blake's good deed, a grisly repayment for human compassion across enemy lines.
The Collapsing Barrack (Situational Irony)
When they first explore the German barracks, Schofield and Blake are excited to find it abandoned, and believe that it could be their way through no man's land to safety. However, in an ironic twist, a rat sets off a booby trap that makes the ceiling of the barracks collapse, and nearly kills Schofield.
Warning Mackenzie (Dramatic Irony)
When Schofield arrives at the Second Battalion, he forces his way into a fortification where Mackenzie is making plans for the next wave of attacks on the Germans. Schofield pleads with him to call off the attack, as he has orders from General Erinmore. At first Mackenzie does not take him seriously, and insists that they must push ahead with the attacks. In this moment, the viewer knows that this is unwise, but Mackenzie has no idea, leading to some dramatic irony.
Tom Blake's Death (Dramatic Irony)
When Schofield finds Joseph Blake, he tells him that he has come from the same troop as Tom Blake, and Joseph gets excited that his brother is there. In this split second, there is a heartbreaking dramatic irony, in which Joseph does not yet know that his brother is dead, but the viewer does.
