"Yes, I'm sure I shut off the power."
"I emptied the barrels after last hunting season, so it is perfectly harmless. Let me show you..."
"Yes, I washed out that test tube from the ebola experiment before using it as a shot glass."
"I assure you, all fail-safes are in place. There is no way this space craft could develop any serious malfunctions."
"No, it's not metal fatigue. These skyscrapers just sometimes make weird groans. Look, I'll step out here and prove it to you..."
"Yes, I'm quite sure we'll be adequately shielded from the blast."
"...and, as you can see, this cobra is quite domesticated."
"You did mend that tear in the space suit like I asked you, right?"
"I'm sure these aliens are friendly. It is just their way of greeting us."