The lyrics to Javier García's song Tranquila describe climbing up a mountain... and then climbing back down. Meanwhile, the video depicts passengers on a bus. But, guess what?: In Spanish, "to climb up or down a mountain" and "to get on or off a bus" use the same two verbs: subir y bajar.
Let's take a closer look at the lyrics:
Súbete a una montaña
Climb up a mountain
Quédate un ratito
Stay for a while
Y después te bajas
And then you get down
Captions 6-8, Javier García - Tranquila
Play Caption
The lyrics here would still make linguistic sense if García sang about a bus ride:
Súbete a un autobús
Quédate un ratito
Y después te bajas
In Spanish, you also use subir and bajar to describe getting in and out of a car, climbing up or down stairs, taking an escalator up or down, getting on or off a train or subway or horse.... In other words, subir and bajar are an essential pair of verbs to know to get around town.
(As an aside: Whether or not you use the reflexive form of subir and/or bajar in this context is a matter of emphasis and formality. Note that it's less formal -- and less technically correct, according to the Real Academía Española -- to use the "te" pronouns in this song. Saying súbete... above is somewhat akin to saying, say, "get yourself..." in English. Call it creative license.)