I just have it in mind from when I was young, during the paleomonolithic era, when channels got 4µm long thanks to polysilicon gates. It was in the US if memory serves.
Plain SiH4 exploded. I expect phenylsilane to have a similar autoignition temperature because its Si-H bonds are as weak, or even weaker due to the phenyl.
there are many instances, recently with N2O under nasty conditions.
The destructive power isn't worse than other compounds, but the chances of ignition are very high, just with a delay so some amount has accumulated. With natural gas, you have good chances to ventilate the room on time. With silane, about every leak explodes.