I've always wondered whether Voldemort ever summoned a Death Eater at a bad time. Like in the middle of a shower. It wouldn't go over very smoothly, amirite?

It might if it was bellatrix

OMG YES!!!!
Like he'd be in the shower and accidentally scrub some soap on his arm, and the Death Eater would pop up.
Voldemort: Um.....
Death Eater: ...
awkward silence
Voldemort: DIE!!! (raises arm) o wait... I left my wand on the kitchen table... wait here ok? (leaves)
Death Eater:.....
(voldemort returns)
Death Eater: Why must you do this, sir?
Voldemort: BECAUSE NO ONE SEES THE DARK LORD NUDE AND LIVES TO TELL THE TALE! AVADA KEDAVRA!!!
Alternatively, the Death Eater could summon Voldemort, maybe when he was at a dinner party. Mass destruction ensues.