Surviving the Bubble
When playing the Bubble of a tournament you should not be playing to win the tournament, you should be playing to survive the bubble and make the money. This may mean playing so tight you throw away KK to avoid losing to an Ace. The only hand I allow myself to go all-in with is pocket aces, and here's why.
When you've put money in to play a tournament and you're on the Bubble, the most important thing is to survive long enough to win back your money, which means you are only playing to survive 1 player getting knocked out. If you have 15 BBs, or even as low as 10 BBs, then you should be folding just about anything because you can basically fold to the money at that point and win back your money plus a little spending change.
Don't try to win the tournament from the bubble, it's just not worth being out the cost of the tourney.
Now, if you only have around 5BBs, then my range would open up to where I would call all-ins with any hand I would normally call all-ins with. This is because it is too easy to blind out between blinds and antes. You need chips to make it to the money and you can't get them by folding premium
hands to an all-in call. Always remember, smaller stacks always have a chance of doubling up and making you the small stack on the bubble.
And if you are down to 1-3 BBs then yeah, make the call with A5o. you are so desparate to double up at that point that you probably should have just gone all-in yourself hoping to induce a fold.