You look down and see your clothes start to... disappear. Parts of your clothes seemed to fray first, other others turned to dust. It didn't seem The Wave didn't care how it god rid of them, but you soon found yourself naked an at the mercy of the elements, as a general 30 year old man. You wondered if this Wave would leave you like this, but then a tinging came to you head. You guess that would be the start of your changes, and you decided you wanted to see how things would go if you ended up as just another mindless dino. You made yourself back outside too a pool of water to see your reflection.
You barely made it due to the head disorientation from the changes, and wondered how yours would go. With the last of the footage that was available as the Wave passed through the world, you saw changes ranging from pulses, to people tearing out of their "human" shells, to more comical ways. Regardless, it never seemed to take more than a minute, and you were starting yours.
Your head seemed to follow the pulse-style of transforming. You could literally see your head pulse back and forth, bigger than smaller, but always much more bigger than started. It wasn't just staying human either, you could see your dino-ness coming in with each pulse, and not evening either. You were growing a snout but the sharp, carnivorous teeth were only growing on one side, while a giant reptellian eye seemed to be coming in much faster on your new face than anything else. With all this came all the disorientation, of different sight, different senses, and just a wild transformation in general, but luckily it wasn't actually painful. Soon things began to even out, and you found yourself with an oddly light but-incredibly-out-of-place giant dinosaur head on your human body. One of the first things you noticed was how altered your eyesight is now, and for the worse, but before you could take your new head in detail, the rest of the changes came in.
The pulsing started with your penis, and it didn't take long to cum from sensation, but you saw that your penis was pulsing smaller. Figures, a gender change too. With the pulses came changes to the surrounding area, mostly affecting your legs and stomach. With some new use of your dino head, you decided to sit on your butt and watch your lower body get Wave'd. You legs became digitigrade, 5 toes came 3 on each foot with reptilian claws, with a bit of a useless toe on the backside, and with each pulse your lower body grew massive to match your head. Your belly and thighs grew to become saurian, and your dino-gina became a bit hidden among its pebbly texture. You were surprised you didn't have a tail, but maybe that would come later. You wiggled your new toes a bit, not being able to do match as your head and lower torso changed, but your upper torso was a tiny man's with arms attached with what must be a very large predator.
Soon you felt the changes to your upper torso come, although it felt the the Wave would still have a sense of humor with the changes. The changes pulses more intensely to one side, leaving you quickly with a dino-sized arm with 3 clawed fingers on one hand, although the arm was still tiny compared to the rest of your body. To play with the last remnants of your humanity, you did your best to copy what your human arm was doing with your dino-arm, revealing that the dino-arm would most likely be less useful in terms of 5 fingers including a much more useful thumb. Soon your more-human torso caught up, and soon you a gigantic dino, albeit with an odd looking back, tail-less, and sitting on your ass. At this point you were pretty sure you were a Giganotosaurus from your recent memory of a popular dinosaur movie series, but needing some finishing some touches. On queue, you felt tingles on your back and butt. Not yet use to your body, you rolled to your belly and once again used pool to see your changes.
Spines became more prevalent on your back, becoming small towards and on your head, and also become smaller towards what seemed to be your tail growing, and the spines didn't seem particularly spikey. This was much less eventual in terms of how the transformation paced itself, but you found the novelty of going from tail-less to a giant dino tail to be very great. You also found that your skin... or scales now... turned into a light green with a paint-splash pattern of dark green coming from your back, and head. You kind of had the look of an iguana, if not for the rest of your body.
Your changes are now finished. No trace of your humanity remained, and you closed your eyes waiting for the inevitable mental change into a mindless, female Giganotosaurus.