The answer is - Silom MRT when you take the lift between the station concourse and the overhead walkway to Saladaeng BTS. On the way up - no apology. On the way down (but I think only if you call the lift up from the concourse) - apology. I thought it an easy-peasy question (except for your average sex tourist, and even then they're the mass-transit stations most likely), but apparently not