Throughout the movie the characters refer to The Computer as the HX368. Gomez there even types it as such in one part of the film, also the credits at the end of the film refer to it as the same. Meanwhile all the other computer graphics refer to the computer as the HX254.
Appollonia's hair when she is attempting to save Fingal from being sucked into the computer.
We see that for the six hours of real time, the equivalent of several months pass for Aram Fingal inside the computer. However, in numerous scenes, Appollonia (in the real world) speaks to Fingal at a normal pace. To Fingal, these few seconds should have seemed to stretch out for hours; he should not have been able to comprehend them as they were spoken.
When Aram's mother is run over, there is a medium shot of Pierre talking to Aram. During their conversation the bottom of the boom mic pops into frame for a second or two and then leaves frame.