Feat[]
https://www.youtube.com/watch?v=dPMM3dwiCWQ&t=58s
http://www.watchframebyframe.com/watch/yt/dPMM3dwiCWQ at around 0:58:00.
Speed[]

To find the distance, I'm gonna use Jumbo Josh's height (712.17 cm tall in that time.)
The time was 0:59:13 to 0:59:37. The video started with 1 frame and 30 FPS;
37 - 13 = 24
It was 0.24 seconds, now let's find the distance of Stinger Flynn's tentacle;
Distance: 13.0324 meters
Now let's find the speed for the final result;
13.0324 / 0.24 = 54.3016666667 m/s, Subsonic
But he was rotated by Jumbo Josh, so lets measure tentacle's length:
13.0324 * pi * 2/4 = 20.4712460493 m
20.4712460493 / 0.24 = 85.2968585388 m/s - still Subsonic
Jumbo Josh's reaction speed and agility is Subsonic.