1. Freak out that there is blood on his pants
2. Demand that he strip them off in the backyard, garage, or other location as far away from you as he can.
3. Have him put all his clothing in a big paper bag
4. Add some newspaper to the bag (helps absorb the blood)
5. Set bag in outside grill, fireplace, or other such location
6. Light bag on fire
7. Walk away happy to help
8. Find out when he is yelling about burnt pants that it was only fake blood used for training and he was messing around with you
9. Say “well that should teach you”
10. Pay no attention to his questions on why you never asked if he was okay. Truth is if he is not missing a body part when he comes home you will still have to deal with crazy pranks like this and it’s nothing to get too excited about anymore.