Why were they so amused by the retinal scanner?
Yea, it's cool and I totally want one to be able to grant me access to home and/or bedroom, but they acted like it was their first time using one. Sometime between their meeting with the colonel and go to the lab for the first time their unique eyeprints or whatever had to have been recorded, and surely their ability to access something had to have been tested, though perhaps not with something saying "access granted", otherwise it'd be like making a copy of a key without making sure it actually works in the intended lock.
(this signature was absent on picture day)