It might happen thusly:
Siberian gets in Juggernaut's way.
Juggernaut picks it up and pitches it overhand, straight at Manton's van with such velocity that the Manton has no time to cancel the projection before it acts like an oversized sabot round and over penetrates the van. The cloud of spalled metal and shockwave will finish Manton off.
Normal human nerves are slow. Taylornaut can throw something hard enough that it can cover the distance before Manton has time to react... namely by hearing the hypersonic crack 2-3 seconds after Sibby has blown through the van. 10 MegaNewtons is enough force tp accelerate 1kg to 10,000,000 m/s, or 3.34% C.
Taylor could throw the Siberian hard enough to initiate a fusion event. She'd survive, of course, but everyone within miles would be pissed at her.