The first three times the countdown device under Hunter's chair is seen, the times are 81 minutes, then 49 minutes, then 74 minutes.
After Tamira returns from the restroom after first meeting Hunter, the wine bottle disappears from the table as Lily says "I'll give you a few minutes," only to reappear seconds later.
At the end of the movie, when there was about 7:30 minutes left on the bomb (meaning it was 7:22pm), Peter was driving back to the restaurant and the clock showed 5:23pm.
Tamira claims that no decent rehab center would have taken in a black girl. The actress is 35, which would mean that Tamira would have been 15 in 2005. The Apartheid ended in 1994, segregation had long since been over.