I don't remember everything I did, but I do remember trying to delete my lamp and I couldn't select it. I tried moving an object around on the map but I couldn't even select it. the A key still select everything. I can still move things around when an object is already selected. so what I did is I gave up on that project and created a new one. I deleted the cube and added a plane. I went to edit mode and tried deleting the vertices. I couldn't even select it. does anyone know what I did or whats going on? I'm using Vr. 2.78.