You're dead, son. Cheer is contraindicated.

Right,' Thomas said. 'Where are we headed?'
'To where they treat me like royalty,' I said.
'We're going to Burger King?'
I rubbed the heel of my hand against my forehead and spelled fratricide in a subvocal mutter, but I had to spell out temporary insanity and justifiable homicide, too, before I calmed down enough to speak politely. 'Just take a left and drive. Please.'
'Well,' Thomas said, grinning, 'since you said 'please'
- Thomas Raith & Harry Dresden, Small Favor, Jim Butcher

Do you really think you can win?'
'Yeah. Hell, Ortega is only the third or fourth most disturbing thing I've tangled with today.'
'But even if you do win, what does it change?'
'Me getting kiilled now. That way, I get to be killed later tonight instead.'
- Susan Rodriguez & Harry Dresden, Death Masks, Jim Butcher

My laboratory,' I said, experimentally, drawing out each syllable. 'Why is it that saying it like that always makes me want to follow it with 'mwoo-hah-hah-hahhhhh'? '
'You were overexposed to Hammer Films as a child?'
- Harry Dresden & Bob the Skull, Changes, Jim Butcher

...The next time I opened my eyes, I was in the morgue.
This, all by itself, is enough to really ruin your day.
I was lying on the examining table, and Butters, complete with his surgical gown and his tray of autopsy instruments, stood over me.
'I'm not dead!' I sputtered. 'I'm not dead!'
- Harry Dresden, Death Masks, Jim Butcher

You need to know where to go,' Sanya said.
'Yes,'
'And you are going to consult four large pizzas for guidance.'
'Yes,' I said.
...'There is, I think, humour here which does not translate well from English into sanity.'
'That's pretty rich coming from the agnostic Knight of the Cross with a holy Sword who takes his orders from an archangel.' I said.
- Harry Dresden & Sanya, Changes, Jim Butcher