Kirkwood's waiter put in an inopportune appearance with the bill.
Think of it coming in at that inopportune moment, just as telegrams do at a play!
Buel frowned at the approaching boat, and cursed its inopportune arrival.
As it was he bit his lip in vexation at this most inopportune interruption.
At this inopportune moment Mosby made a charge which broke our column.