I started mine once while the radio was off. It stalled on me, and I must have brushed the Rx switch while restarting it. It went screaming off at half throttle, bounced off a few trees, plowed through a chain-link, then all I could do was hold it until it stalled on it's own again because the body I had at the time was too tight to reach the fuel lines...and the tires were about the size of dinnerplates...somehow that engine survived that okay. It fired up just fine the next day.

Since then I've made it a habit to waggle the controls before I grab the pull start, just to be sure there's actually a response from it.

I suppose I could pull another D'oh from the last time I ran it. I have an electronic failsafe, which trips about 9001 times per tank, but I don't run a throttle return spring. Fitting one to a CEN MT2 is a bit of a bother and I couldn't be assed. Well, last time I drove it, I was out on the street in front of my house doing speed runs. I jerked it wide open from a dead stop, the OS .18 screamed to life, and that was the last time the CEN has been under my control. That sudden jolt of acceleration dislodged the connector that attaches the batteries to the receiver. All I could do was scream "RUNAWAY!", as I had a friend there with me and didn't feel like driving anyone to the ER with a busted ankle on top of a full throttle runaway, and wait for the shower of parts as a 40-45MPH missile hurtled down the street. I got lucky, though, and it just went into a ditch and overturned itself near where I was, so I could pounce on it and hold it in place. I was running without a shell so I had no trouble pinching the fuel line before the OS overheated itself.

Amazingly, neither runaway actually broke anything. Though, the second one did annihilate the clutch shoes, they're worn down to 50% or so of what they should be.