He's saying to Norwegian media that his lungs were affected badly after Mo Ahmed's move with 2 laps to go. But he quitted as a pacemaker, and he didn't even look exhausted!!!. In every 5000m race you have athletes running out of gas, like Chelimo in the last 200m. Or Henrik, dropped in the 1st k...
Regarding his 1500m participation, this is the "honest effort rule';
Failure to participate
4. At all competitions under Rules 1.1(a), (b), (c) and (f), except as
provided below, an athlete shall be excluded from participation in
all further events in the competition, including relays, in cases
(a) a final confirmation was given that the athlete would start in an
event but then failed to participate;
(b) he qualified in preliminaries or heats for further participation in
an event but then failed to participate further.
The provision of a medical certificate, endorsed by a medical officer
appointed or approved by the IAAF and/or the Organising
Committee, may be accepted as sufficient reason to accept that the
athlete became unable to compete after confirmations closed or after
competing in a previous round but will be able to compete in further
events on a subsequent day of the competition. Other justifiable
reasons (e.g. factors independent of the athlete’s own actions, such
as problems with the official transport system) may, after
confirmation, also be accepted by the Technical Delegate(s).
Note (i): A fixed time for the final confirmation of participation
shall be published in advance.
Note (ii): Failure to participate includes failure to compete honestly
with bona fide effort. The relevant Referee will decide on this and
the corresponding reference must be made in the official results.
The situation foreseen in this Note will not apply to combined events