Yesterday i was fishing a run with a lot of chop! And with a fast paced current, and i was drifting a silver colorado through it and all i saw was the float twich no tug on the line, the float just wiggled a little, so i struck and for a second i had a fish on the other end. My most "vicious" strikes have just been when the float slips under, really slow. all the others have been little movements, or i've felt something wrong with the line. Except for one fish on the capilano that just hammered my roe, he hit so hard the floats splashed on the way under, i was fishing for early coho. I guess its because of where i fish for my steelies. Usually its the upper vedder, which means they've seen alot of gear on a very high pressured system.
Oh and i find that smaller fish strike way harder than bigger ones.