1 blood stopping sponges
2 keep people from bleeding out
3 It can quickly help the person rather than having to wait for a doctor
4 This is safe because there is really nothing better to do unless you just want to die
5 No but it soon will
http://archive.armytimes.com/article/20140208/NEWS04/302080004/Injectable-sponges-can-stop-bleeding-15-seconds