I had that happen at the mouth of the tualatin. I was trying out the coho fishing last year and a carp sucked the spoon off the topwater before it ever fell. Never seen it before, haven't since. Pretty cool huh? I was using a much smaller spoon, i think it confused it for a minnow. Guess that'd be the idea anyhow. Congrats on your carp, sorry it wasn't steel