Can't remember the exact video, maybe it was in Coffee Club podcast, but some of the ON Athletics people were talking about Grivalja after Boston (?) putting his shoes on right away after the mile and walking away, like he wasn't tired or exhausted right after the race at all. (Plus, I believe he had also run another race earlier in the day, like the 3K) They were all laughing that Grivalda was acting like it was no big deal, but perhaps he actually wasn't very fatigued, lol.