Sitting on my balcony. saw intense blue/white exhaust fantail rear end of appeared to be large (500 ft or larger missile accelerating from NE to SW at Mach 1 initially to well past Mach 3 in ten (10) seconds. Possible missile shaped, flat/dark skinned covering length 500 plus feet. No sound of rocket motor and heat signature of flame type wrong with standard heat signature. Due to proximity to craft appeared to be 3000 ft from ground going up at 15 degree incline very fast.I'm formally military paratrooper/infantry with forward air support training in addition to sniper and artillery support experience.Complete with military inventory of US, Russian, and Chinese fighter planes and bombers. As well as surface and air to air missile systems.This is in a high density civilian area and after the craft passed by (no sound!) it disappeared like a blink no more tail and no sonic boom given fast acceleration.Canada does not have this technology.Color of flame like exhaust from rear of shape not consistent with rockets, air to air missiles period. appeared to be more of a glow than flame.END