X-Men

Hugh Jackman took ice-cold showers every morning of filming in order to help get into character. This tradition started when jumping into the shower at 5 a.m. before realizing there was no hot water. Shocked awake but not wanting to wake his sleeping wife, he gritted his teeth and bore it before realizing that this mindset, wanting to scream and lash out at something, but having to hold it in, was the mentality that Wolverine is in constantly. He then made cold showers his Wolverine preparation routine for each movie featuring the character.

(at around 1h 14 mins) Between when Cyclops blows open a door in the Statue of Liberty, and when he sees Jean in peril, he gains and loses a pair of gloves between shots.

When the 20th Century Fox logo fades away, the X in the logo stays for a second longer before it also fades away.

The special edition DVD titled X-Men 1.5 features an option to add the deleted scenes back into the film, increasing the runtime to 111 minutes.

Edited into FX2: Visual Effects (2003)