Possible Clues:

• An unknown figure gained admission to kill
• Following street, signalled left, taking foot off throttle
• This is the way to have you out of breath to a certain degree at last
• The street corner leaves one quite breathless
• Half way along the street there's a corner that'll take your breath away
• An unknown figure gained access, to murder
• Throttle and start to reverse in street corner
• Learner driver's introduced to unfamiliar choke
• Stop flow in street right on corner
• Throttle -- unusual to be squeezed by learner? On the contrary