I see both a wheelbarrow task and a task using a large cart with crates. Possibly two different tasks.
Art and JJ may have an physical issue of some sort too, hard to tell from the brief clip that was included.
IV line means exhaustion, i suspect, and I doubt seriously this is an extended pit stop, although all of the clips seem to be in the daytime. And don't forget that the amount of time from the release in Tanzania to arrival in Cochin was almost 33-ish hours for Mark and Bopper. So fatigue is very likely to be a serious problem for them along with the physical toll of these last three legs.
Peach, I wish Neobie or someone could attempt to calculate the times from the pit stop check-ins at the end of the episode. My sense is that it is at least mid afternoon for Mark and Bopper, while my impression is that Rachel and Dave likely finished the leg in 3 hours or less once their flight arrived in Cochin, so by 10:00 am.