I’d say it takes some bravery for this father and son team to cut open a grenade.
Lets face it. Finding out what is inside a grenade can be one dangerous gig. That is why when it came to the cutting open part, these folks made sure the grenades were not live. Just in case, please leave the dirty work to these guys instead of trying to do this at home.
Check out this video and see what they found at the center.
The folks in the video succeeded in cutting open a pineapple an apple grenade. Both of which were obviously not live. That is the key reason as to why they are both alive.
Please, please, please, be very careful if you ever attempt anything like this.