When Jo and Allison are talking in the ship, the clock behind Jo counts down to 40 minutes, 1 second. The camera cuts away to Allison for several seconds, then back to Jo; the clock still shows 40 minutes.
When Henry stops the Adraeus countdown he uses the term "Mark.", which denotes the exact second that the countdown should have stopped. At that second, the countdown was at 5hrs, 15mins, 32 secs. Later, when Henry, Allison and Jack are discussing the black holes in front of the countdown timer, the countdown is being held at 5hrs, 15mins, 11secs.
When Sheriff Carter looks in his driver side mirror and sees a black hole, the mirror says "Objects in mirror are closer than they appear." While humorous in the context, that label appears only on the passenger side mirror of cars, not the driver side.
Packing a person's body in cushioning gel to protect it during acceleration will not protect internal organs which be slammed around inside and be damaged beyond repair.
The deep-sea "torpedo" that is used to deliver the antimatter to the black-hole is clearly marked as a surface-to-air missile.
They tell Jack to place the missile next to the event horizon, but the gravitational pull that close would tear everything apart. Spaghettification would occur long before Jack reached the event horizon.
The number plate on Taggart's truck, before it gets sucked up, is: DSG 384, which is Sheriff Carter's plate number and has been for the majority of the series.