When they are going through the computer guy's trash, Mother (Dan Akroyd) is wearing an "Aleka's Attic" t-shirt which was River Phoenix's (Carl's) band. See more...
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In the scene where Redford's character enters through the secured entrance with the stolen key-card, it shows a printer printing the time he entered. Then after his walking and getting up to the top floor and trying to get past the voice verification system and having to do it twice, they show the same printer printing the time he passed that checkpoint, and it was only one minute later than the previous time. Even though seconds are not shown, all of these actions must surely have taken longer than 1 minute and 59 seconds.