Just a clarification question about "bonking" (still find it tricky to say that without a smile on my face - "hitting the wall" seems much more ... seemly...)

I understood bonking to be more than just dead legs... I thought bonking was when you literally have no juice left - not only do your legs not want to work - your whole body is screaming stop, and if you don't listen then within moments you literally stop and this usually results in a crash or fall...

I think when you recognise you need some fuel, and stop and have/get it, then you are close to bonking. But to bonk is to literally stop functioning...

Any opinions?