Why would my air conditioning suction line suddenly fail?

What is your question?

It looks like it got against the exhaust manifold, got a hole burned into it and ruptured. Very clean break but looks burned on both ends of the hose. When I held the two ends together, the hose looked too long for the space it was in. I couldn't see any bracket to hold the hose away from the engine. Can you help me? Thanks.