The implants are made of implant grade silicone...they cannot burst...as they are a solid molded structure. If he took a severe blow to the implants what could happen is migration or rejection of the implants themselves. The later would mess up the tatoo if not removed and well the first would probably leave some lop sideded boobies or something fun like that. But the implants used in the mod community are safe and can actually take quite a bit of trauma without having any ill affects happen to the placement or the implant itself.