answer: he takes something out of a case , then sets the case down .
question: what is the first thing you see the guy doing ?
answer: i can 't tell for sure , but it looks like it might be a screwdriver .
question: can you see what he takes out the case ?
answer: on the floor , on a landing where a stool stands .
question: what does he set the case down on ?
answer: it looks like he might be tightening a screw with the screwdriver .
question: what is he doing with the stool ?