When there is a hero with some elastic abilities, he often makes moves that makes absolutely no sense in regard of the laws of physics.
But a man named Joe is not able to avoid them. Having his body recently fused with a strange material with excellent elastic properties, Joe must now abide by the following conditions :
- Elastic material always acts as it should be : Force is proportionnal to the distance of elongation (even negative elongation).
- Conservation of mass. This limits the range of stretching, up to 10 times the regular size. Over this limit, plastic deformation occurs, and damage is done to the extended bodypart
In order to be able to keep a secret identity, Joe can solidify his bones at will (to make them as solid as normal bones)
It would be possible to solidify on an extended limb, but it would become spontaneously more fragile.
Joe hasn't got any experience with advanced combat techniques, he learnt on his own to keep his balance when throwing punches and kicks, and that's pretty much all about his training as a new superhero.
How efficient would he be in combat against armed thugs (with brass knuckles, bats, guns, etc...) ?