I have lost internet connection many times, It is not so much of a problem when playing Freerolls, but when I buy-in to a game any money I have used to be lost by no mistake of my own, really stinks! That is why I do not Buy-in for huge amounts when playing On-line Poker. I simply do not trust the connection.
At least in a casino I can Pick up my chips and Leave if the power should go out, or at worse get my money back for the buy-in. although that has never happened to me in any Casino I have played in.
Once playing a freeroll On-line I was called away from my computer before the game started and I was gone for several hours, but when I returned I found I had actually made the Money without playing a single hand, Not a lot, but Free Money all the same, My only explanation for it is I must have won several all-ins during the game when I was low on chips and managed to double up by players trying to take me out, This of course would never happen in a Cash Game or a Buy-in Tournament, So maybe there are Poker Gods out there