haha yep it will help with traffic lights too!
Maize, yes just remove the magnet when you drain. The metal will be slightly magnetized and my not flow out with your tranny fluid. Some may stay in that area until you split your cases and wipe out the metal shards. You can also try and wipe some of it out if you have your clutch cover off and clutch bell removed. Either way, the metal shards will stay in place down by the drain plug. These magnets are INSANELY strong.