Wow that really sucks bro.. I am so sorry to hear about your loss!! I have never heard of 3 jumping out in one night like that.. My last red line snakehead I had left did the same thing about a year ago and I promised myself I would never let that happen to one of my fish again, so now I keep 5lb. bags of gravel on all my lids... R.I.P. fishy"s!!!!