deewar par apna sar maaring
Does it matter if you can turn microwave ON with door open or shut! 
The question is will the head explode if exposed to Microwaves? and the answer is NO. The head bones will CRACK definitely but they will not EXPLODE. Same goes with brain and meat. it simply wouldn’t explode. Reason being that an explosion occures when there is compressed air traped within an enclosed environment, of course microwave excites particles on molecular level but it would not generate enough pressure to cause an explosion, as skull is NOT an enclosed vessel. Only EYES will pop, only because of rapid change in temperature which will cause eye fluid to expend rapidly, resulting a ruptured eyeball.
masoomiyat say dekhing