If there was one thing Joseph was sure of at the time, it was that he needed to get out of overheat as quickly as possible without being incapacitated first.
For the most part, this meant running, but thanks to the ring he was wearing, he could accelerate the process by falling.

Thus, he started running in the direction in which the two other divers had headed before a floor above him. It ensured he was out of sight for longer, and as that area was not swept yet, he was less likely to run into more divers. However, before reaching a staircase or similar way up to the floor above, he should take a turn into another hallway, otherwise one of the divers above could cut off his route.