Alright, I'm fairly new to Blender and I'm currently following this video tutorial (Blender Tutorial: Create a Spaceship Corridor in Blender by Blender Guru) in order to get familiar with basic modelling, extrusions, mirroring etc.
At 7:25 (direct link), the guy creates a little handle for the door/structure thingy he's currently modeling. He selects a face at the lower part of the mirrored model, goes to extrusion mode (E), cancels extrusion (ESC), scales it (S) and then he decides to remove the lower face.
It should now look like this:
However, when I follow the exact key combination (shown at the lower right of the video), I end up with that:
Did he somehow 'extruded' the face by moving it inwards? There aren't any keys showing up that might indicate this.
I hope this isn't a stupid question. Blender heavily relies on keyboard shortcuts for efficient working and until I'm not 100% familiar with them, a lot of it is pure sorcery. :)