What "dumb" things have you done in relation to R.C.? Getting into rc.
Ive tried starting nitro's with no fuel, dead igniter/no igniter and a disconnected fuel line, you can imagine the fuel every where from priming it with the line disconnected lol. Just a couple days ago I was rebuilding my ofna nexx 8t after cleaning it and after I finally got it mostly back together I realized I forgot the diff shims, take it all back apart lol. I know there are plenty of other's but those are the first I thought of.