Major will attempt to squeeze through and remove any immediate clothing if it will help. If he can't safely do it then he won't try anymore in case he gets stuck.
Specific Action: Gault carefully feels his way around the room, wall to wall, till he reaches Major and Uhura's location. Gault also shuffles his feet to make scertain that he does not trip or fall on things he is unaware of.
Uhura will not attempt to go through the hole, She stays exactly in the same spot choosing to watch the room for any changes to the plants or frogs.
Artemis will ask the others to move to a safe distance from the tree root. Then she will ask for a volunteer to hold the light. Then, she will lift her axe and begin methodically hacking away at the wood to expand the opening. When her arms get too tired to swing the axe, she'll offer it to anybody else who wishes to take a turn.
Major not only moves far back he goes all the way outside of the room and wraps some cloth around his face and head. He uses the binoculars to see what is happening. The moment any of the analyzers make a signal about harmful radioactivity or whatever he will go all the way to the entrance of the temple and wait there. Before going outside he will first check if anyone is there.
Specific Action: Uhura exits the room. She leaves the analyzer near Major, if it goes off she hopes he will grab it and move away as well. She will wait half way towards the entrance of the cave so she can probably have enough light to see where something there.