Question

how can we loose a large amount of charge from our body ....i got this question after watching Walter Lewin with his Vandegraaff

Answer 1

Can you provide a link to the specific part of Walter Lewin's lecture? As for loosing large amount of charge, I can think of grounding ( http://en.wikipedia.org/wiki/Ground_(electricity) ) as one.

Answer 2

charge is easily lost from our body to the earth even if u are wearing shoes.

Answer 3

you will not be able to loose a large amount of charge from your body as long as you stand on ground or for that matter of fact is connected to earth. this is so coz as soon as you have a charge on you it will spread uniformly around the earth's surface as well. so you need to first isolated somehow.

Still if you some how managed to be isolated...place urself is a very very strong field(i guess, may be you require vacuum as air ionizes), and then your cells which at the end of the day are molecules must be polarized. But this will ofcourse har you and to be honest will kill you.

i will say that ur question is still a bit incomplete and is more like answering a science fiction.