This was used to practically speed blitz Geera, the same woman who was dancing around meliodas and ban. And if you look closely in the fifth scan by the time he counters geera's explosives and by the time they are finally finished exploding, king's daggers were already above her head. Meaning his daggers were already above her head by the time he was done countering the explosives with his spears.(you can see her watching the explosions then a panel later you can see king's daggers already above her head.) The Velocity of Detonation of explosives range from between 2000 - 8000 m/s. (2000 meters per second is mach 5-6 8000 meters per second is mach 23. This shouldn't be too far fetched considering Meliodas is a casual lightning timer. But i digress. I will simply say the speed of his telekinetic utilization is around Mach 5 to Mach 10. But his telekinesis manipulation gets far faster later on so double digits shouldn't be too far fetched.)