Who are the bantu and role did they have in african history ?

"The Bantu peoples are the speakers of Bantu languages, comprising several hundred ethnic groups in sub-Saharan Africa, spread over a vast area from Central Africa across the African Great Lakes to Southern Africa." according to Wikipedia

the answer to your question is:

strong-mayor system

well that depends on how deep the hole is. you'd first go through te crust of the earth, then the upper mantle, then the lower mantle then the outer core, then the inner cor then you'd be stuck in the core to melt.