Respect the Propeller
One of the most dangerous items in our hobby is the propeller. When it is turning it can do terrible damage. Flesh and bone is no match for it.
The other day at the field I was amazed at how some modelers will reach over the propeller to plug in the battery on their electric aircraft. A transmitter or receiver that is on can cause the unintentional start up of the motor.
And those that fly nitro or gas also have been seen to make adjustment to their carb while reaching over the prop. Please install batteries or adjust engines from behind the propeller.
And for you electric fans please install arming plugs and you will be preventing many possible accidents. Remember that propeller is out to get you, give it a lot of respect.