Full power and off we go. My mains had just touched and ATC called for a GA, they obviously saw something I didn't and I was airborne a few seconds later. Circ

Full power and off we go. My mains had just touched and ATC called for a GA, they obviously saw something I didn't and I was airborne a few seconds later. Circled and landed with no issues. It could've been anything from metal on the runway to an aircraft not responding or reading back in time while taxing to a priority medevac helicopter.