I tried that - my Swedish friends friends got quite a good laugh out of it, when I was puking my heart out.
Frank
Who needs enemies when your friends treat you to surströmming! I can imagine, it is a pretty common reaction for people who have never eaten it before and who try it the wrong way. I think you'd be pleasantly surprised by how good the real actual dish is, flatbread with potatoes, sour cream, onions and just a little bit of surströmming is actually really tasty, although I know it's hard to believe if you've already had such a surströmming experience before...
A friend of mine from Germany wanted to try surströmming when he visited. We suggested eating it properly, but he wanted "see if it's as bad as the internet says". He took a full filet, put iut in his mouth, chewed, swallowed, gave us a surprised "that was it??", and then had another one...
