or teach him the other reasons why driving through any water at all isn't a good thing. Even with a waterproof esc the water could permanently damage anything made with steel, obviously nuts and bolts but also driveshafts, driveshaft pins, outdrive cups etc etc. Those of us with crawlers like to run in total crap conditions like mud and water but many like myself with an investment in money time and their pride in their rig will after a session spend some time mitigating the damage done by the water..... If it is run in water then blast it with some wd40 to displace the water at least, pull off a couple pieces and wipe it down, clean off all debris etc.