Way back, when I used to mess about with [disposable]

R.C. toys at our private airfield near Houghton's winery, I had a couple of episodes like that.
Mainly because my sneaky mongrel lowlife mates all switched their crystals so they matched with my transmitter.
4 radios "controlling" 1 x dodgy home made aircraft was either impressive, amusing or downright scary [depending on your point of view]
I couldn't work out WTF was going on until the crew couldn't hold back from laughing.
stephen