Everyone was paralyzed. No-one could move.
Correction. Everyone moved immensely slowly.
Suggestion. Read mind. Find out reality.
They dived in. The thoughts were a soothing chaos, despite only being marginally slower than the bodies.
They were fast. That was the answer. Everyone was slower than them.
Target. Enable increase of body's speed to prevent boredom.
Target. Enable decrease of mental speed to interact with others.
They hid. Their brain whirred on, as they were carried from the wreckage of their family's house by the giant (3 years), as they flew on a motorbike over Surrey (5 years), as they were placed on the doorstep of their maternal aunt (2 years). On the last day of the tenth year, their eyes snapped open.
Target reached. Bodily speed increased.
Vacate basket. Age increase to match mental. Create clothes, get rid of basket.
Find forest. Hibernate. Achieve mental target. Agreed.
The now 13-year-olds stood up and walked off into the distance, momentarily pausing to reorganise a pair of frozen tramps into an extremely compromising position. Satisfied with their work, they resumed their journey.
A/N: I'm sorry about my other story, but my brain will refuse to focus on any one thing for too long, so don't expect regular updates. I will try, but I cannot guarantee success.
This is my take on 'The Killing Curse affected Harry's brain more than they thought.' And yes, I did include the plurals on purpose.