Interesting. The only F-15s stationed in that area are the S models (their version of the E model), so I'm assuming the "aide" is what their ignorant press calls a WSO.
The F-15E and S have a selector valve that is supposed to be placed to "aft initiate" before takeoff, which will punch out both crew members if either pulls the ejection handles. If it is left in "Norm" it will only punch out both crew members if the front seater pulls the handles. If the back seater pulls the handles, it only punches him out. I would guess that the "aide" left the handle in norm, then freaked out and punched out. On the plus side, that mistake probably saved the RSAF a 50 million dollar jet.
And this is humorous:
If they found the bird, my guess it that it wasn't ingested, it was a birdstrike. The "incident" wasn't caused by a Falcon, it was caused by some jack-hole who punched out of the jet because a bird bounced off of it.