Another MeFi post; you can read the thread yourself for lessons on the inadvisability of releasing foreign fish into local waterways (hopefully, the brackish East River suffices to kill this particular specimen, but carp are tough bastards and it's not inconceivable that it could somehow fight its way upstream to fresher waters), but I just want to note the following paragraph from an article linked in the thread:
To make matters worse with the carp, the silver variety can leap as high as 10 feet out of the water if surprised by a passing boat or jet ski. Gaden said more boaters are suffering broken noses and other injuries when they're hit by jumping carp.
I cannot help but feel a bit of schadenfreude at the poetic justice of a jetskier/motorboater's getting bashed in the face by a jumping carp whilst roaring about on the lake. Both obnoxious foreign invaders with no respect for their environment, and both shocked out of their senses by the sudden appearance of the other --- their mutual bonk is as sweet and fitting as a bride and groom's climactic wedding kiss.