These World Championships are quickly coming to an end but already we have a number of magical moments to store in the memory bank. 

Usain Bolt beats Justin Gatlin again, Allyson Felix wins a ninth world title, Dina Asher-Smith produces another thigh-slappingly good performance, and Christian Taylor goes close to the triple jump world record. 

These championships can't have much more up its sleeve, surely? 

We'll find out on Friday because Asher-Smith goes again, and this time it's the final, while Katarina Johnson-Thompson seeks redemption in the long jump final and Tiffany Porter will battle for 100m hurdles gold. 

Three British medals on day seven? Join us on Friday to find out. 

Image source, Getty Images

Before we wave goodbye, tt would be remiss not to show Usain Bolt falling head over heels on the Beijing track again. Being as the Jamaican laughed about it, so can we. He can defy the form book, but he can't defy gravity or a photographer.

There's plenty of great highlights to watch on the BBC Sport website, even if we do say so ourselves. 

Dina Asher-Smith came within 0.02 seconds of breaking the British 200m record as she qualified fastest for Friday's final. Fancy watching that? No problem. Here it is. 

Image source, Getty Images

Maybe it doesn't matter for now, all the talk of Justin Gatlin's negative impact on the sport has been overshadowed by Usain Bolt's magnificent achievements, just as most people had hoped it would. 

But earlier there was a lively and passionate debate on BBC Two as Steve Cram and Michael Johnson reacted to Renaldo Nehemiah's claims that the BBC had been unprofessional in their coverage of the 100m final. 

To watch the debate again, simply click here.

Image source, BBC Sport

Christian Taylor's winning jump of 18.21m was close, but not close enough...

Usain Bolt will rightly dominate the headlines for the next 24 hours or so, but let's not forget about Olympic champion Christian Taylor, who became world champion with the second longest triple jump in history. 

He was eight centimetres from Jonathan Edwards' world record 18.29m, but the Britain's mark lives on for another day. 

Usain Bolt was out of the blocks quicker than Justin Gatlin and that must have put added pressure on the American. The world champ was able to relax down the home straight, job done in the first 100m. 

Another day ends with a magical dash to the line. Usain Bolt is still the king of sprinters, Gatlin tried to beat him but couldn't, a photographer attempted to kill him but failed. No-one can dethrone the Jamaican. 

If you want to read about how Bolt slayed Gatlin the report is here.

There was 0.19 seconds separating Usain Bolt and Justin Gatlin, which is quite a chunk considering the American was the world leader before the race. 

Michael Johnson
400m world record holder on BBC TV

"Dina Asher-Smith has a bright future and is in a very good position for a medal. This 200m final coming up tomorrow is not full of athletes who have run under 22 seconds so it's a pretty wide open 200m."

From the men to the women... Friday's women's 200m lane draw has been revealed and Asher-Smith will start in lane three, with Elaine Thompson and Dafne Schippers in view. 

1. Campbell-Brown 

2. Lalova-Collio 

3. Asher-Smith 

4. Thompson

5. Schippers 

6. McGrone 

7. Tarmoh 

8. Simpson  

The master of the big stages, and the master of the selfie... The Usain Bolt Bird's Nest party truly under way.  

Image source, ap

If there was doubt coming into Beijing, there is now none - Usain Bolt is the number one sprinter in the world. 

Coming into these championships he had raced only one 200m all summer, a lackluster 20.13 secs back in May, but the six-time Olympic champion is a master of delivering on the biggest stages of all. 

Image source, Reuters

Estelle Buscombe:  Another fantastic performance from @usainbolt, external and another triumph for athletics. Bring on Rio!

Charlotte A:  Believe the hype! Usain Bolt is supreme.  We all gathered round the computer and stopped work to watch the man in action. 

There's a game to be played with this picture, surely. Instead of red and white, the man hidden in the picture is wearing gold and green.

Image source, Getty Images

Usain Bolt joked that the photographer tried to kill him. You can judge for yourselves by watching the photographer go crash, bang, wallop into the fastest man in history. 

He's done it again with a performance which is worth watching again. You can watch the greatest there's ever been win yet another world title by clicking here.