i was out flying the spark and noticed I was getting some interference issues. I happened to look over and about 200 yards away was a group using remote RC cars. Wondering if somehow the interference I was getting was caused by the additional controller traffic. Flown same location a few times and never had it happen before. Interference consisted of a short loss of video on the RC controller, also got a warning to turn off Bluetooth devices, as well as a choppy feed for a short time. Again not sure if the additional RC controllers could have something to do with it, not a huge issue but just an observation.