Nachino

const meteors = [8,3,-5, -2, 7, 9, -2, -30, 7, 9, 8, -1, -4, 10, -20] 
// (8, -5, 7, -30, -1, -20) -> (8, -30, -1, -20) -> (-30, -1, -20) 
const recursiveMeteorCrashDetector = (meteors) => {
let collisions = false
meteors.reduce((acc, curr) => {
  if(acc.length > 0 && curr*acc.slice(-1) < 0) {
    const difference = Math.abs(acc.slice(-1)) - Math.abs(curr)
    if(Math.abs(acc.slice(-1)) - Math.abs(curr) < 0) {
    	collisions = true
      acc.splice(-1, 1)
    } 
      return acc
  }
  return [...acc, curr]
}, [])
if(collisions) {
	return recursiveMeteorCrashDetector(meteors)
}
}

console.log(recursiveMeteorCrashDetector(recursiveMeteorCrashDetector(meteors)))