Today, at the end of the class, a student came to ask me detail about my rainwater infiltration sinkhole (see detail). He is a working engineer (without title yet) at a large building site in Tel Aviv, and the Municipality is demanding from them to solve the surface runoff disposal problem. In Tel Aviv, built on sand dunes, the freatic water table is very near the surface, causing severe damages to the the foundations. I didnt know but apparently Tel Aviv is considering to impose my solution as standard requirement. Most of the students are already working in construction and I had the satisfaction to show them that I am not a text book teacher but someone who does things in the real world. I like to imagine that my prestige rocketed sky high.