Don't some of the Metal Gear Solid games let you mess around with cutscenes?
Sometimes they let you go into first person view and in MGS4 pressing x sometimes gave you flashbacks of the previous games. There is one sequence where Snake intentionally drops his cigar to get a privileged view of Naomi, allowing you to go into first person view while he picks it up and look at her legs.
There was one awesome feature during the briefings though that allowed you to take control of a small robot and explore the area while the cutscene was taking place, you could actually bump into the legs of the characters while they were talking to each other and if one of the characters left the scene and went to a different room you could actually go after it and completely ignore the event, checking out what was going on "off-screen". The first time I did that it blew my mind, there I was thinking I was just watching another cutscene and somehow I press the right button and I'm seeing Otacon's legs, then I try to move and realize I can explore the whole plane in first person view and look for hidden items while the cutscene is playing out. MGS4 is full of awesome details.
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