I was playing the single player "scuba" mission. I use the "optics temporary" command on my right mouse button. Just after destroying the helicopter, the boat out in the bay killed me while I was still looking thru my scope. Well the game had auto saved and when I reverted, I was stuck in the scope and pressing RMB caused me to remove the scope temporarily until releasing RMB causing be to go back to the scope. A reverse of the normal effect. {F18417}