Fun movie, but they forgot to count the killings ;))
The number 41 had appeared on Lucy's forehead. But in the ending of the movie the 2 psychos kill both the old lady and the stupid FBI agent Dammers, afterwards killing Frank as well. Yet they tell Lucy that she'll be number 42! They made a big deal at keeping count of their killings, or I wouldn't have brought this up.
Anyway, I don't think it was such a big deal, but it was funny to forget about something like this!
My ratings are not always like the IMDB average score because I only enjoy intelligent movies.