Penalty at 18:30 so now the period goes another 30 seconds, then there is another penalty at 19:00 minutes so now the period goes another 60 seconds, then when we are into the extended period there is another penalty 30 seconds into the extended period so now it must continue again otherwise we're in the exact same scenario and on and on and on and on and on and on and on etc. etc. etc.
btw - what's wrong with 20 minute periods for whatever reason? We have the best sport in the world and so many people want to tinker and tinker and adjust and change. What's wrong with the way it is?
btw2 - I am an outside the box thinker, at the same time why change something that isn't a problem? I like to examine things and do not believe in the mind process of saying we should do things the same because "that's the way it's always been done". In the same breathe I don't think it usually makes sense to change things for the sake of making a change.