Operating Speed Puns

So, when I was first learning to drive (actually my first time operating the car), my dad was teaching me to control the engine's RPM. However, he likes to troll me every once in awhile; this is what he did. Keep in mind we're parked in our driveway, parking break on, in neutral...

"Alright, weediereedie, you're going to want to hover around 2000 RPM, so I want you to really concentrate on keeping the engine at that speed. Hear what the engine sounds like when you go too far, or go under." I concentrate really intensely, and lose focus on what's going on around me. All of a sudden, my dad shouts in my ear "WATCH OUT THERE'S A TRUCK ABOUT TO CRASH INTO US!!" I immediately duck my head, cry out in fear, and slam my foot on the gas, while my dad cracks up in the passenger seat to the point of tears. Love you, Dad...most of the time :)