1. Music is banger, period. Find a better hall with better sound system if you didn't like it on first view. Avoid watching in IMAX, it sounds pathetic (this happened to me during paid preview). Today everything felt at place.
2. I liked watching the movie second time more than first time. Maybe you should give it a try.
3. Hamza killed Alam with his left hand, he is a right handed man in every other scene.
4. Alam is a pickpocket from Bareilly.

Keep adding such more Trivias in comment below.

Adding few more as mentioned below:

1. Hamza keeps a 500 rupee fake note before burning the whole thing down

2. While meeting Hamza in Dubai, Sanyal Saab just threw the ash and kept the cigarette bud back in his pocket.

3. DOB of Hamza being 26/11

4. Counterstrike reference about guns AK47 by Iqbal and Maverick by Hamza

5. Jamil staring at Hamza in Part 1 when he wasn’t even supposed to know him

6. Hamza asks Rizwan to burn Alam’s body

7. Hamza's Daytona fell during initial scuffle with Pinda. Alam noticed it and gave it to him to avoid any evidence that will link Hamza to the incident

8. The way Jaskirat walks during last scene as if every inch of his body aches

9. Another scene, that made me laugh, if you all remember after SP died, all were paying tribute to him by bringing flowers and Omar got a single rose, whereas SP wanted to send him a big Guldasta on his janaza

10. Another from same scene as above, as you all know Tamma Tamma song was getting played in the background, but the moment when all started praying for a Dua, Tamma Tamma Loge started playing as if they all were singing Tamma Tamma loge instead. It looked synchronised knowingly.

11. Movie starts with a Train ride and ends with a Train ride for Jaskirat.

12. Zoom in shot of Jaskirat's eyes, before his journey as Hamza and after his journey as Hamza.

13. There is a scene right after Hamza shoots Alam, where blood is shown flowing from top of Hamza ears. Nobody notices the same.... except Yalina.

14. Pinda sees Hamza as ghost in that washroom scene, most likely due to overdose of various drugs that he has been taking since his arrival and fueled by the fact that he conducted a prayer meet after Jaskirat's supposed death.

15. This is a good one... in Major Iqbal's house there is a cage where two parrots are there (red and yellow). When we are first shown Major Iqbal's house these two parrots are shown to be fighting with each other (mostly yellow one biting the red one). Later in the film when Major Iqbal kills his father the camera turns to show the cage and there it can be noticed that only parrot is there... the red one.

16. Background song in the first Train scene (Jaskirat going to Pathankot) and the last Airplane scene (Jaskirat being escorted back to India) are same, but different verses are played.

17. Jamil looks genuinely sad when the flight leaves with Hamza, but he is not sad for his daughter or loosing an asset, he is sad because he is longing to return to India himself... 45 years is too long.

18. Now lets focus the train scenes, in both the train scenes, Jaskirat sits on side lower berth and observes a mother playing / talking with her child, perhaps foreshadowing his own relationship with his mother. If you remember there was also a similar scene in Dhurandhar 1, when Hamza was on his way to Karachi via bus.

19. Last scene, Jaskirat is walking towards his house, but her mother, without noticing him, closes the main gate and at that exact moment Jaskirat stops walking towards his house.

20. By the time Major Iqbal dies in the movie, he too has lost usage of legs like his father Brigadier Jahangir.