Right so 300kmph = 83.3 m/s which means every 83.3 metres (call it 100) buys you an additional second of thinking time and back of the envelope calculation (2km/minute) [0] suggests you can move up to 33 metres per second horizontally (feel like this is optimistic - I openly welcome corrections here...)

In any case a fun thought experiment

[0]https://www.quora.com/What-is-the-average-horizontal-distanc...