Time to get back to work. He started digging and digging, ambient sounds animals and insects making are now natural noises to him.
He kept digging and from time to time, he emptied with his shovel the hole full of broken rocks and put them in his bags to clean the place up and go outside to put them there before he go back home.
He kept digging and digging, he looked at the hole and saw that he reached a less hard ground, a mud part. Looked at his watch and it was almost 5pm.
This means waters infiltrated the ground. From now on this would be easier to dig.
He kept digging and digging he looked at his watch and was almost 6pm.
Ambient noises around suddely shut. The cave became much more colder. His eyes started watering and his body reacting to something he himself didn't see was having goosebump.
From all these events he quickly packed his stuff and got out of the cave. Once outside, he took bags full of rocks and went back home wandering what made these things happen.
...