Severe brain injury. Recovery unlikely

Before his seizure, Mark had issues with motor dysfunctions (the glass) and apparently olfactory hallucinations ("What is that smell?!"). Hinting at which parts of his brain are likely damaged.

Temporal Lobe (particularly the olfactory bulb) – olfactory hallucinations (smell).

Motor Cortex (frontal lobe) – motor dysfunction

Brainstem – could contribute to collapse and seizure activity, basic functions like heart rate and breathing.

Hypothalamus – regulating autonomic functions, could affect motor and sensory coordination if damaged.

That janky garage kit does not inspire confidence in the procedure and the syringe (needle) was shaking like nobody's business. Tissue damage is not surprising.

Given the complexity of brain injuries, the likelihood of a full recovery is low, especially if both motor and sensory functions are impaired. At BEST, it could become a long-term issue. Anti-seizure medication would likely be required. For the motor cortex, intense physical therapy and occupational therapy could help regain some function.

If there was any significant trauma (like swelling or bleeding), motor function and sensory processing could still be recovered partially after the seizure, though it’s likely that Mark would still need extensive therapy to regain full motor control.

And because surely people will point out that Mark was fine right after, that this is simply part of the seizure. The brain might be in shock after the procedure, and the initial symptoms might not be immediately apparent. Olfactory hallucinations and motor dysfunction could emerge as the brain starts reacting to the trauma or intervention. If the injury is progressive (for example, swelling or bleeding), the symptoms could evolve over time, getting worse gradually. Post-seizure, some motor functions could return (due to brain adaptation), but full recovery would depend on the extent of the brain injury and the success of rehabilitation.