Blimey. What a fantastic end to an entertaining day of track and field. Usain Bolt and Justin Gatlin have ensured there'll be another headline-making showdown on Thursday in the 200m. Three men dipped under 44 seconds in the same 400m race for the first time in history, the exhausted victor carried away on a stretcher, while Kenya have their first javelin world champion.
We will be back tomorrow to guide you through another day. But until then why not check out CBBC's latest quiz, titled 'Could Rutherford jump...' or read our day-by-day coverage guide - or our medal table and results page... I could go on...Bye for now.