Soldato
it's a liquid they squish up the tail pipe - no intense jet - just whatever's in it 'reacts' in some way and in a short space of time wants to get back out!! idea being it 'softens' anything up there and takes it with it on the way back out. you then spend the next while (what feels like a lifetime) having to camp on the loo (similar to the sensation you have with moviprep - but there's less actual 'stuff' coming back out!)Fair play. Is it just like an intense jet of liquid? I guess some trusts just decide which method they prefer and you don't have much choice?