The 29-year-old was involved in a road accident in late September after attending a concert in Amsterdam as his taxi hit a pillar on its way to the airport.
"When a player has a free day at Manchester City, most of the players go to London, others to Italy, some to Spain," Aguero told TyC Sport.
"I was lucky that I know the agent of [Colombian singer] Maluma, he invited me and I went. I had almost two days off and going to the airport was when I had that accident.
"Then one thinks "why did I [go]", but it's difficult to imagine that something like that could happen."
Man City return to action this Saturday with a Premier League home game against Stoke City.