Around 7 am this morning I woke up to my bathroom sink spewing water from underneath. The hot water feed was disconnected including the water shut off valve and spewing burning hot water into my bathroom. I am curious to know what would cause this to happen, and what I can do to prevent it from happening again? We live in a rental townhome built about 3 years ago, although since it is a college construction I wouldn't doubt that they cut corners with things like plumbing. Never had any problems really with the water, other than the pressure from that sink being fairly low. help? I know I don't know many plumbing technical terms so I am including a (poor) picture of the plumbing. 
** update! I remembered that yesterday our power went off for like two minutes. This happens every now and then, and we usually have to go and flip the breaker. Could this ahve somehting ot do with it?
Plumbing – what would cause a bathroom sink connector hose to pop off
hot-waterplumbingwaterwater-heaterwater-pressure
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Best Answer
Since those flex connectors are pretty cheap, I'd just buy a new one rather than figure out whether the existing one has lost tension at the spring connection or just got dirty/greasy enough to lose hold.
Of course, make sure the end of the source pipe is clean, and if it looks worn or damaged, cut a half-inch or so off before reconnecting.