5. Clark Kent Holds Up The Oil Rig (Man Of Steel)
Following the death of his adoptive Father Jonathan, Clark Kent - prior to donning the famous Superman costume - spends several years living a nomadic lifestyle, working different jobs under false identities, while saving people in secret. Most notably, while he is working on an oil rig out at sea, a huge fire causes everyone present to be evacuated. However, the evacuation wasn't quick enough and the oil rig begins to collapse while people are still trying to escape in the emergency vehicles. Whilst ushering everyone to safety, Clark opts to step in and prevent the rig from collapsing himself by holding the gigantic structure up with his own super-strength as everyone escapes. At such an early stage in his development, after successfully saving those around him, he collapses under the stress of the rig, but the fact he managed to hold it up at all is a hulking feat of strength.