Pain seems to be easier, or melancholy seems to be easier to portray in a character. I don't know if that's because I'm a human being or because I'm an Irishman or both.

I count 'Underworld 4' as my training period for 'Total Recall.' I do think it was hard because I didn't realize how tired I was. It is quite a lot to sustain that kind of physical work over nine months altogether and by the end of it, I definitely felt like I had aged quite a bit in that year.

Quite often on a movie like Total Recall you have this training period of two or three months where, like on the first 'Underworld' I was doing gymnastics and trampolining and all this stuff which I don't do in the movie necessarily, but mentally it helps. You come home and you go: 'Well, I've done all that. I must be an action star now!' So it helps you focus a little bit and gets you fit.

[Yorgos Lanthimos] is really a master I feel, I really do.

It can be a bit annoying if another actor is trying to talk to the director and the wife is sitting on his lap.

I had a list of about 35 restaurants, 25 of which were fast-food joints all around Los Angeles and I didn't get a quarter through the list. It just became me thinking about going to these places and wanting to enjoy the food and food just not being enjoyable anymore.

The idea of implanting memories where by the implantee couldn't tell the difference between a real experience and a fantasy experience was really cool. And his ideas of technology - do we control technology or does technology begin to control us? His work hasn't aged a day it seems.