On his spacewalk, Ben and Addison both marvel at the panorama of stars, only because the Earth is so bright in low orbit, outer space appears totally black.
When Addison tells Ben that he leaped into the body of astronaut David Tamura, Ben is surprised because he idolized Tamura as a boy. However, by that point, Ben had already seen Tamura's reflection as his own when he manifested into the shuttle, so if Ben idolized Tamura so much, it would not make sense for him not to recognize Tamura's reflection. [However, Ben is suffering from partial amnesia. So he could remember his childhood idol's name and significance to him, but not his appearance.]
During his space walk, Ben speaks into his radio transmitter in order to talk to Addison, yet no one aboard the space craft--where his voice would be received--responds to him or asks Ben who he is speaking to.