In actual fact, DL can do more than that. DL can phase and 'unphase' selected parts of his body - something not commonly seen in other fictional characters with this ability. This means he can phase his arm through a door, unphase his fingers so as to unlock the door from the other side and then phase his whole arm back through.
Phasing is both a means of attack and defence allowing you to slip through walls to evade danger (or imprisonment) or pass your hand through a person's defences - even their own body - in order to subdue them.

Watch your fave Heroes moments
If there are people with even the smallest ability in these feilds, the goverment is right in saying "you want the truth, you cant handle the truth" and for the most part they are right, most people just arn't open minded enough to handle something like that.
HEROES ROCKS MAN
*spoiler alert*
DL uses his power to put his fist inside Mr lindermans head and squishing his brain (to kill him). this is just after he is shot taking the bullet for NIkki but for some reason he can't get the bullets out... so... if something is in him h
nd wen he had taken that bullet i think he didnt want to phase it out or else it would of hit niki so it makes sense why its still in him.
nd wen he had taken that bullet i think he didnt want to phase it out or else it would of hit niki so it makes sense why its still in him.