Here is a link to the actual story without the Huffington Post's dubious journalistic style. Its still a crazy situation but not it did not go quite the way the Post made it out.
The original story states that he poored some on himself as well. While I don't freak out about getting blood on me, I'm not going to poor any on myself either. Maybe that is a little telling.
...poured some of the blood onto gauze for the student's fake injury to make the wound look more realistic, he said. The paramedic then spilled some of the blood onto himself and the student's skin, he said.