Calc Hibari biting to the death some explosions

In a "fight" between Hibari and Tsuna friends, Gokudera use him new skill Bomb Blitz to outspeed Hibari and surround him with a large amount of TNT. But in a point blank range Hibari was capable to block all the detonations with him Tonfas.

So, Hibari had 1.69m of height. And from his head to the middle of the body is like 69.7 cm.

Using that info, with had that the proximity of Hibari and one of the near blank point TNT is like 5.5 cm to 3.7 cm. And was surrounded by 34 TNT.

And TNT detonation velocity is 6,940 m/s. So Hibari in 0.055/6940=0.0000079s blocked 34 TNT explosion.

Hibari arm was like 62cm of large and him moved it would be like travel 1.2m, and him using him tonfas like an helix blocked the explosion. So him moving like 4 times him arms or something like that for a low end.

So is something like this. 1.2*4=4.8m/0.0000079=607594m/s or mach 1787. This is the low end.

Using as reference the distance of 3.7cm between Hibari and the TNT the time is 0.037/6940=0.000005s. So the speed is 4.8/0.000005=960000m/s or mach 2823.

All this in the beginning of the manga, before him training with Dino and obtain the Vongola Ring.

Any correction will be welcome.