When Julian and Danny are at the bullfight, Danny is wearing a light blue shirt and khaki pants. Afterwards when they're both having a drink at the outdoor cafe, Danny appears to be wearing a yellow button down shirt under his jacket with dark blue pants. The scene immediately after, when Danny is sitting on the floor listening to a message from his partner, he is back to wearing the light blue shirt and khaki pants.
When Julian and Danny get out of the rental car in the middle of the night, in the middle of winter, you can't see their "breath". The scene was obviously shot during warmer weather, using fake snow.
When Julian is telling the story about his first mistake in Manila, the camera can be seen, hidden behind palm leaves and bamboo, when two guys holding a mirror are walking through the frame.
It's the song "Heat of the moment" by the band "Asia".
You can here the song in the scene at the end of the movie again. Julian and Danny are working together on the race track, and the song is played in the background of this scene.
This could be understand, that Danny wanted to do something special but wasn't able to do it at the beginning of the movie. So he stops the alarm clock immediately and the song could'nt play.
But in the end of the movie, he is doing something great and really special, and now, the song is playing.