Britain's Andy Turner finished fourth in the final of the 60m hurdles at the World Indoor Championships.
Farah (back) had to make up plenty of ground just to finish sixth
Turner, the European outdoor 110m hurdles bronze medallist, hit a couple of hurdles and clocked 7.67 seconds. Fellow Brit Allan Scott was sixth.
Mo Farah scraped into the 3,000m final as a fastest loser after falling, getting back up and finishing sixth.
And Nathan Douglas and Phillips Idowu qualified for the triple jump final in first and third respectively.
In the 60m hurdles, the Dutch pair of Gregory Sedoc (7.63) and Marcel van der Westen (7.64) took gold and silver while Spain's Jackson Quinonez (7.65) took bronze.
"I messed up royally," said Turner, "I'm devastated, all I had to do was run a half-decent race and I would have won a medal.
I didn't want all the training I have done to go out of the window
"I didn't get out of the blocks well, clipped a couple of hurdles and I messed it up."
In the triple jump, Douglas went furthest with a 16.96m jump, with Idowu reaching 16.82m.
"I was a little bit nervous after I missed the first jump," said Douglas, the only athlete to reach the automatic qualifying distance.
"I just had to slow it down and control my run up to get a good one in. The distance was a bit less than I was hoping for but this early on I was just concentrating on qualifying."
Russia's Yevgeniy Plotnir split the British pair with a jump of 16.84m after two earlier fouls.
The triple jump final starts at 1335 GMT on Saturday.
Farah showed real character to get himself back in contention in the 3,000m heat after getting involved in an accidental tangle of legs with Austria's Gunther Weidlinger.
"A guy just kicked me on the leg - I went head first and didn't know where I was," said Farah.
"I took off running the wrong way and then I realised there was nobody there.
"But I decided I had to catch them - I didn't want all the training I have done to go out of the window.
"The crowd got behind me, shouting my name, and that helped."
He finished in a time of seven minutes 55.36 seconds to get through, but the performances of Spain's Jesus Espana and Turkey's Halil Akkas in winning their heats have served notice of their form ahead of Saturday's final.
The youngest member of the British squad, 18-year-old James Brewer, made a solid start on his senior debut as he qualifying for Saturday's 800m semi-finals in 1:50.46.
Richard Hill also advanced as did the Republic of Ireland's David McCarthy.
In the 400m heats, Ireland's David Gillick confirmed his status as the world's fastest runner indoors this year as he went through to the semi-finals with the quickest time of the field.
Britain's Robert Tobin won his heat in dominant fashion to record the second quickest time, and his team-mate Dale Garland squeezed into the last qualification place as a fastest loser.
Germany's Bjorn Otto finished in first place in the pole vault, clearing the automatic qualification height of 5.70m at his first attempt.
Britain's Steven Lewis was unable to make the final after two failures at 5.65m and another at 5.70m.
Slovakia's Mikulas Konopka took gold in the men's shot put with 21.57m.
Belarus' Pavel Lyzhyn was second with 20.82 while Denmark's Joachim Olsen took bronze with 20.55.