So that no one misunderstands the gravity of this, it
is not unusual for an uncontained failure of one low-mounted engine to cause secondary shrapnel damage to an opposite engine. The escaping projectiles are traveling so fast that slipstream has virtually no effect.
The object protruding from the outboard side of #2 engine in the LAFD photo appears to me to be a section of a HP turbine disc (a few hundred Kg) which left the #1 engine a very few milliseconds earlier, traveled horizontally under the fuselage, tore a gash in the belly, and almost tore completely thruogh #2. An instant double engine failure.
Fortunately, uncontained failures are
VERY rare due to some of the highest design and maintenance standards in
any industry.
