During all of the dream scenes when Teal'c was in the hospital, he was wearing "scrubs", never a patient "gown", which would be required as someone scheduled for surgery.
Teal'c apparently faints and Carter remarks that he was flat on his back. People who truly faint (syncope) fall forward, so he should have fallen flat on his face if he had fainted.
Teal'c tells Carter that he would prefer to not consume bovine lactose at any temperature: however, in Unnatural Selection (2002) he seemed very interested in the ice cream he was eating.
When Teal'c said 'bovine lactose', he presumably meant milk. The writers presumably wanted to give him some characteristcally pedantic, albeit inaccurate, way to say 'milk'. (Lactose is a sugar and only one component of milk.) His enjoyment of the ice cream does not contradict his aversion to milk. Many people enjoy dairy products (ice cream, cheese, yoghurt, etc.) but do not like drinking milk. Moreover, many 'ice creams' contain little or no milk.
When Teal'c transitions from his firefighter character in the hospital to himself at SGC, where he is conversing with Dr Frasier, he has no forehead tattoo, he is also in the blue scrubs from the hospital. After he lays down in the bed his tattoo reappears and his scrubs are white. This is during the dream sequence transition and was completely intentional.
When the fire trucks arrive at the accident site, the camera crane's shadow is visible at the bottom of the screen.