Halit Dajdzo who plays (Jack) had to wear several Bloodbags tapped on his Body for the action sequence. 24 Bloodbags were planned to explode on his Body. When one of them injured his chest pretty bad, the shooting was stopped for 2 hours. So finally only 8 Bloodbags were used and the scene was shot with six cameras to fake the same impact. After the scene was done, Halit Dajdzo admitted that he faked the pain because he just wanted a long break.
Philipp Danne who plays the role of Billy was cast 4 days before shooting.
Mustafa A. Kuzu who plays Hernandez came up with the idea of being a Spanish SWAT-Guy right before they were about the shoot. The director M.E.G. thought it was much funnier this way, so they changed the script right on set and shot it in Spanish.
The extras who should have played the SWATBOYS didn't appear at the day of shooting, so the director just picked up his friends, who were just visiting him on the set, and let them play the SWATBOYS.
Jack(Halit Dajdzo) gets shot 30 times.