In Belgium there is a well known and documented case (I think it even included video footage) of an asylum seeker which died this way during her expulsion, so I guess there is at least some truth to it. May also depend on other factors as the type of pillow and the force applied. Read about the case here: http://en.wikipedia.org/wiki/Semira_Adamu

In Belgium there is a well known and documented case (I think it even included video footage) of an asylum seeker which died this way during her expulsion, so I guess there is at least some truth to it. Definitely also depend on other factors as the type of pillow and the force applied. Read about the case here: http://en.wikipedia.org/wiki/Semira_Adamu