It's because that first thing was all over the code.
You just say the first thing that comes into your head.
If it rains this evening, I will mow the lawn first thing tomorrow.
Si llueve esta noche, cortaré el césped a primera hora de mañana.
The team manager wants to review them first thing tomorrow morning.
El jefe de equipo quiere verlos a primera hora de la mañana.
You are the first thing I've loved more than myself.
Eres la primera cosa que he amado más que a mi misma.
One of the first thing people research is their lodging place.
The first thing that we are going to need is enthusiasm.
La primera cosa que nos va a hacer falta, es el entusiasmo.
Borscht is like the first thing you greet your people with.
El borscht es la primera cosa con lo que saludas a tu gente.
This is perhaps the first thing that is worth checking out.
Esta es quizás la primera cosa que vale la pena echarle un vistazo.
Think about it, the first thing to go is your grip.
Piense de ella, la primera cosa para ir es su apretón.
The camera will detect the first thing that moves and start recording.
La cámara detectará la primera cosa que se mueve y empieza a grabar.
He's having an executive staff meeting first thing tomorrow.
Va a tener una reunión de personal ejecutivo mañana a primera hora.
Our Annie's not a pretty sight first thing in morning.
Annie no es una buena vista a primera hora de la mañana.