Leaving YUL on a Dash-8 yesterday, one of the last passengers to board was a dad travelling with a small infant in a stroller that I had seen in the boarding area earlier. Guy gets on the plane having gate checked everything, and the GA working outside (with her high-vis vest, ear protection, sunglasses) comes on the plane and says "sir, you forgot something ... I can't keep your baby". And hands him the baby back.