Visible Limiting Reagents

Use the example of something obvious, such as reaction between two compounds, and you get 200 tons of one, and half a gram of the other one - which one is the limiting reagent, and why is it the limiting reagent? Because you run out of it before you run out of the other one. It’s something that they can imagine, something they can see. Or even in the lab, if you don't have 200 tons but one litre of one and a few milligrams of the other.