Big difference is they don't tell you in the manual not to do 20 foot jumps either. They do however warn against stupid things such as stopping a flywheel with your finger. And besides a 20 foot jump won't harm you unless your jumping it into yourself and the person asking the question is a newbie not good advice to give to someone new is to jam their finger into the flywheel, pinching the fuel line isn't going to ruin your engine I do it all the time and have yet to ruin an engine from it and sorry but I earn my living fabricating composites and sheet metal for f-16 aircraft and isn't no way I'm losing my job cause I lost a finger from jamming it into a flywheel cause I couldn't spend time to read the manual. I own a Savage/Revo/T-Maxx/Jato/Evader/Xcell and 3 different 1/6th scale gasers and none of the nitro manuals mention sticking a finger into the flywheel matter a fact all the traxxas ones are equiped with a fuel line pinch and the savage routes the fuel line behind the rear bulkhead for easy shut down by pinching it.