With track temperatures soaring to over 30 degrees and having already run 10,000m late on Saturday evening, a 5000m semi-final was the last thing Mo Farah wanted to compete in.
Indeed, as the reigning champion and one of the world's premiere runner, the Olympic qualification race was child's play compared to what the Team GB athlete is capable of.
However, there are no byes in athletics with even Usain Bolt having to run through preliminary sprint rounds, so Farah was forced to expend some energy making it into the top five.
But it could have all gone pear-shaped for the three-time gold medal winner after he was tripped in the final 300 meters of the race. Farah appeared to be clipped by American Hassan Mead behind him, who fell flat on the floor.
Farah managed to stay on his feet but only just. If he had hit the deck, the dream of winning the 'double-double' would have been as good as over. As it were, he managed to regain his balance and finished in third place, making it into the final.
- Watch the moment Farah's Olympic dream almost came to and end by CLICKING HERE.
The situation was far more serious than the fall he suffered in the 10,000m final. Then, he may have fallen completely, but he had over half of the race remaining to recover and did so with panache.
He, however, seemed calm in his post-race interview with the BBC and seemed more concerned with the heat he had just run in.
Twitter in meltdown
He was notably calmer than Team GB fans on Twitter, who went into full blown panic mode after seeing Farah stumble on the track for the second time in the space of a week. Take a look at some of the best reaction below:
Farah will compete in his last event of the Rio Olympics on Saturday evening local time but avid fans of Team GB can catch it at 01.30 BST on Sunday. Farah goes into the race as favourite while he will be joined by fellow Brit Andrew Butchart. who came fifth in his 5000m semi-final.
Butchart, who was not expected to make the final, said: "You have got to make yourself known to these guys, I was unknown to the majority of the field before the race and hopefully after today they will keep an eye on me in the final.
"I have never been in this situation before. My aim was to make the final and now I will see what I can do. I have been training my butt off and it shows that if you can put the effort in, you can get the benefits."