15 minutes is all it should take for them to get there. In this instance, it took them about less than 5.
Some guy was convulsing uncontrollably, probably due to an overdose (but at 11am? And where were his friends? He didn't look like your everyday 'overdoser') and within about three minutes the ambo was there - crew to work, guy stabilised, ready to go to the hospital. Boom, done. Sayonara. Hasta la vista.
Like seriously, what would we do without them?