Ack clearly flying past base but guns are blowing up at 1:46 and 1:49.
They tried later but had the distance they explode too early and nothing happens.
This only happens when you fire an 88mm ack in AA mode with distance set beyond the base.
In this case not very far past the base but I've done it myself with distance set way beyond base and acks blow up when shell passes high over them.
