RIVER: Got a problem with archaeologists?

DOCTOR: I'm a time traveller. I point and laugh at archaeologists.

RIVER: Ah. Professor River Song, archaeologist.

DOCTOR: They're coming. They're coming for you, but listen, your life could depend on this. Don't blink. Don't even blink. Blink and you're dead. They are fast, faster than you can believe. Don't turn your back, don't look away, and don't blink. Good luck.

DOCTOR: People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint, it's more like a big ball of wibbly-wobbly, timey-wimey... stuff.

DOCTOR: You feel that pounding in your heart? That tightness in the pit of your stomach? The blood rushing to your head, do you know what that is? That's adventure. The thrill and the fear, and the joy of stepping into the unknown. That's why we're all here, and that's why we're alive!