DVD and Blu-Ray easter eggs

This is a listing of extra hidden stuff on DVDs which a lot of people will never find...until now.

Gremlins 2: The New Batch (1990)	1
Hackers (1995)	1
Harry Potter and the Chamber of Secrets (2002)	1
Harry Potter and the Philosopher's Stone (2001)	3
Harry Potter and the Prisoner of Azkaban (2004)	1
The Heartbreak Kid (2007)	1
Hellboy (2004)	3
A History of Violence (2005)	1
The Hitchhiker's Guide to the Galaxy (2005)	1
Hot Fuzz (2007)	1
How High (2001)	1
I Love You, Man (2009)	1
I Spit On Your Grave (1978)	1
I'm Alan Partridge (1997 TV show)	1
I, Robot (2004)	1
The Incredibles (2004)	10
Independence Day (1996)	1
Insomnia (2002)	1
Inspector Gadget 2 (2003)	1
Iron Man (2008)	2