The second most pervasive image of DeLonge at this point in the late '90s was him running naked through the streets of Los Angeles with a cataract blur hovering over his crotch, as if his penis were a suspect on COPS that refused to sign the release form.
However, when asked about the subject of extraterrestrials, DeLonge would immediately launch into rambling squirrel-eyed diatribes like Mel Gibson in Conspiracy Theory, emphatically spitting out his totally non-ironic belief in vast UFO coverups masterminded by the top levels of American government as rapidly as possible, lest the clock should strike midnight and turn his words back into pumpkins before they'd completely escaped his mouth. Here is a clip of him demonstrating his expertise back in 2002, on the Blink-182 DVD The Urethra Chronicles II, because nothing says you're serious about UFO research quite like a joke about dickhole invasion:
Since I am fairly certain none of you are going to sit through five minutes of a 27-year-old man flapping his lips about Martians while wearing two different articles of his own merchandise, I will convert the important points of the video into written words. He spends the majority of the clip making the unique type of vaguely specific points generally reserved for people who either cannot remember the entirety of the story they are trying to tell or are deliberately withholding information to protect the identities of those involved (in DeLonge's case, it seems to be a little of both). He does this by referring constantly to unverifiable information he's received from a vast network of unnamed "friends," one of whom is supposedly so deeply mired in the global UFO conspiracy that he's had a mental conversation with an alien visitor as it sat nonchalantly on top of a desk in a government installation like a psychic bobblehead. DeLonge is also clearly uncomfortable in the video, shifting constantly in his seat and speaking quietly to the floor as if he expects Tommy Lee Jones to burst into the room at any second and erase his memory. And this isn't the only clip -- search "Tom DeLonge aliens" on YouTube and you'll find dozens of videos of him jackjawing about saucer people that span his entire career.