[reagan_fanatic]

I still can’t tell if the mortar just blew up on him or if he got hit by enemy fire.

[MeanWestTexan]

Looks like counter-battery fire to me.

[IrishPennant]

The final mortar cooked off in the tube from the heat of the previous rounds - there is a rather large but contained explosion which happens to expel each mortar...creates a great deal of heat.