Just anything can break: Send me more of that trash.
	Bomb-proof bikes do not exist. If not just from stress, or metal fatigue, any bicycle part will break from the nasty attack of a concrete edge. Or it could just be your bones that won't take it: (wrist repair)

Samples of trashy bits.

Don't let any creaking noise non-identified before you ride. It is ok if your frame is breaking at the rear, but riding with a cracking fork is not a great idea.

Checking the bike Not a bad idea to check the frame and fork near the welds, and find out where that creaking comes from. Also check the frame around the bottom bracket frame cage. For the bars, chromoly will bend before it cracks, whereas aluminium just snaps with no warning. So it can be wise to replace your handlebars once a year if you do a lot of heavy landing.

More metal fatigue