I was driving my semi northbound on i35 as i do monday through friday, and have been doing for the past 2.5 years. i spotted a very odd object making no noise with an unconventional appearing flight path. i am used to police helicopters taking radar from the sky, and i am well versed on military aircraft... this wasn't even close... it was waaaaaay too big, i mean, the bigger than almost anything i had ever seen airborne before. i shot a grainy video at night and sent it to kxxv channel 25 news and they never reported on it, i also called the mclennan county sherrifs department and they chuckled and never got any further than that, then it happened again, on december 13, at 8:08pm, same stretch of road, and this time my video was a lot better. i am taking video on a samsung galaxy note 8 but it is not picking up the lighting i am seeing of the underside of this craft. no wings, elliptical mass and no conventional shape of any particular sort, just something rigid and extremely large. in the recent video, i capture it floating/flying away over distant tree tops, i climb into my truck and start driving north again as the object continued south/southeast. i see a light in the distance at a high rate of speed circle around in about a 4 or 5 mile radius, approach the interstate, turn abruptly about 300 to 400 feet off the ground and hover... no noise, no down draft and no markings.