Headscratchers / Koi... Mil Gaya

• Why didn't the aliens come back for Jadoo earlier?
  • Maybe they didn't know whether Jadoo was dead or alive. The signal from Sanjay's computer made them realise Jadoo was alive.

• Why didn't Sonia report Raj and his friends for attacking Rohit?
  • It's been made clear that inspector Khan doesn't like Raj's attitude and Raj and his friends have committed criminal assault.

  • It's possible that Sonia held Nisha more responsible for Rohit's attack and chose to single her out specifically for giving Raj an excuse to hurt Rohit.

• Why wasn't Mr Mathur disciplined earlier for insulting Rohit?
  • The teachers probably didn't know, Rohit's principal only confronted Mathur after being told of Rohit's newfound intelligence.

• Why wasn't anybody suspicious of Rohit after his transformation?
  • It's possible that everyone assumed Rohit could have had surgery to correct his disability as this was the only solution.

  • If people had been more suspicious, the movie would have ended a lot quicker?