The Eleventh Hour – While hanging from the TARDIS, the Doctor looks up into it and for a couple of seconds has a confused look on his face. Also, just how did Tennant’s Sonic get in that room? Also, when Rory and Amy exit the elevator on the second floor of the hospital, Rory glances behind him at something, but when he looks back towards Amy, he shakes his head like he forgot something. It is about 42:49. In the scene at the end of the episode where Amy goes into the TARDIS for the first time. there’s one point where she leans back on the console and is looking around the room. The camera is pointed towards her face, so we can’t see what she’s looking at. She looks around with a sort of awe-struck smile, but then her eyes linger over something and her expression turns into a look of horror. She starts breathing really quickly and turns as if to get the Doctor’s attention, but as soon as she’s facing him she just asks, perfectly normally, "Why me?", as if she’d completely forgotten about what she’d just seen. Also, she flicks a TARDIS button/switch/lever at this point. Accidental Amy or something meaningful?
That one is really convincing. I remember watching this episode when it first aired and wondered why she freaked out, then was fine a second later...