Johnny started to feel gassy again.
"BURRP!". His head turned to that of a t-rex.
"BURRP!" His thighs grew thicker and more muscular and hisfeet grew into large 3-toed claws, destroying his shoes.
"BURRP!" A thick tail burst out the seat of his pants.
"BURRP!" He grew in size, destroying his clothes. He was now a 7 foot tall anthromorthic T-rex. The only parts that remained the same size were his arms, although they had grown scales and claws.
"Oh, wow!" exclaimed Johnny "I'm a T-rex! Wait until the others see this!"
Suddenly a final, extra big "BUUURRRRPPPP!!!!" erupted from Johnny, as his belly expanded to massive proportions!
"Oh, no!" he cried, poking his now humongously fat belly. "I'm a prehistoric blimp!". Luckily his powerful legs were able to carry the extra load, but he wasn't sure if he was able to fit out through the door now..