ableton's default bpm is 120, he always starts there, since like 2014 you can see him using ableton in random video clips for the melodies, and it also changes the sound of the melody to be a little more "dirty" which you can hear in a lot of songs. he almost always makes them at 120 cause he makes them in ableton except when he uses sq8l in fl studio
There’s no way we can know for sure, but it seems like he added the explosion sound effect based on its weird placement in the beat. He was with Pierre when they were programming the drums so the influence was direct and indirect