This example is not an indication of collusion, just that he (in my opinion) does not play tourney very well. I have seen numerous people do this. Betting into a dry side pot with a short stack all in is dumb unless you are protecting a made hand that is vulnerable or you are trying to get additional value on a made hand.
Some people disagree with this approach but either way it is very unlikely collusion and at worst just a dumb play.
If you plan to flip with the short stack all-in re-raise preflop and isolate.
Some people disagree with this approach but either way it is very unlikely collusion and at worst just a dumb play.
If you plan to flip with the short stack all-in re-raise preflop and isolate.