The two bi-planes swirled around each other like angry wasps in a violent dogfight.

Bardo, as noted, means in-between state. So whenever we're in between two states, no matter what the scale, we're in a bardo state. These two states could be living and dying or being awake and being asleep, but they could also be the just-past moment of thought and the moment to come. Thus bardo includes the gap between the cessation of one moment of thought and the arising of the next moment.

FAIRY WING GLITTER!!! / sparkle / It's hard to look bad-ass when using fairy powers... sigh

. . . Shows ample evidence carnivorousness Is not impaired by conjugal estate; The flesh consumed, the beefy brethren speed'ly separate.