The monitor in the control room shows the amount of time the gate has been open. This value changes between the different shots in this scene.
When Carter calls up the Gate diagnostics, she asks for a 50% then a 200% increase. This adds up to 450% of normal yet the screen shows 'X200' or 200 times (19900%) of normal.
Not only do the countdowns change between shots but there are also several shots with multiple screens in shot showing similar but unmatched times. Also, in all shots, the millisecond segment is counting is up regardless of whether the others segments are going up or down. No explanation is also given why the counters are going up in the first few scenes but then down from the scene where Rodney appears onward.
At 35:48, O'Neill says "Here we go" and closes the safety covers on all the toggle switches along the bottom of a panel, which appears to ignite the engine. But closing this type of toggle switch safety cover turns the switch off, not on.
O'Neill's oxygen mask while flying the X-302 is a MBU14. That mask was standard issue for USAF and USN jet pilots at the time. It is missing a microphone preamp block and wiring harness. He has no microphone in his mask. Not only would he NOT be able to communicate, but the O2 would be leaking through the holes for the microphone preamp and making an audible hissing noise.
A monitor in the Stargate control room shows the amount of time that the gate has been open. In certain shots, the monitor's display is seen reflected in the window that overlooks the Stargate, but the reflection is not reversed. DVD Commentary tells us that this is on purpose to ensure that the "ticking clock" is still visible to the audience.
Towards the end, a monitor in the briefing room shows that the connection has been open for 58 hours, but, in the next scene, a monitor shows 54 hours. At this point the monitors no longer display how long the connection has been open, but rather how long until the energy buildup becomes critical.
As the X-302 is taxiing to the runway preparing for take-off, a camera mount is visible in the reflection in O'Neill's helmet's visor.
Master Bra'Tac refers to The Stargate where usually he would call it Chappa'ai.