On the freeway today going home. I was going to change lane to my left. Did the usual signal, mirror, head check. Noticed cage 2 lanes left edging to the right, figured he was going to merge into the same lane I was going to, so I waited - still with my signal flashing, keeping an eye on him. He did his head check and looked in my general direction. "OK, he MIGHT have seen me" but to be sure, I waited a couple of seconds for any sign of him changing lane, nothing. Thinking it was safe afterall, I switched lane. Then a second later, guy started changing lane, THEN signal on, THEN he did another head check half-way in. I was back in the right lane at this point. Guy had that "oh shiii where did he come from?" look. Gave him the le sigh + slow head shake, and everyone lived happily ever after. The end. Moral of the story: Glad I didn't completely trust that he's seen me.