Eagle rays jump (stingrays do not) quite often, and if you are on the water often where they live you will see it. You will come to expect it. You will learn where they frequent and not drive your boat fast over shallow areas where they are for this reason. Humans are now going everywhere and at all times; wild creatures doing what they have always done will "interfere". Eagle rays are quite inquisative and seem to have a intelligence underwater. Their face actually looks human-like. I've had over 300 eagle ray encounters while diving or snorkling and many times where eagle rays seemed to lead me to something interesting on purpose.