they , and finally he realised that for every action there is an equal and opposite reaction or in this case stopping distance , the greater his speed , the longer the stopping distance , and usually he had no problem with stopping distances , even in a rush it never took him more than six inches to come to a halt , but as he watched nurse bentleys face go ashen , and she frantically tried to remember the lines to the hail mary , it hit him , he was going to hit her , and despite her natural beauty , the aftermath wasnt going to be a pretty sight , so he locked his legs - and fortunately the janitor had got the floor polish watered down to just the right consistency , too slippery and he would have slid through nurse bentley , through the laboratory and through the outside wall , and not slippery enough , he would have completed the same journey , only head first .