Wierd dino hallucanations

When i was little (like 5-7) i liked dinosaurs a bunch, 

The first time i hallucinated, i was walking to my room, which at the beginning of the hall way. When i turned the corner to the hallway there was a big therapod like dinosaur. I remember it being so life like n stuff and i got super scared cause i waa little and ran into my moms room. I didnt tell her what bad happened thoug.

My second time hallucinating, i was outside in the backyard bymyself, and we had a trampoline. I had to go down a big hill to reach the trampoline, and everything else was just woods, and a pond with a trail along the edge. So i was jumping on the trampoline having fun, and when i looked over at the pond, at the edge was another bug therapod-like dinosaur. Of couse i also got scared this time and ran inside. 

I also remember each time i had low grumbling, like a crocodile would do, but it was always faint and for 2-3 seconds.

These were both on very seperate days but i think within the same year. 

I dont know what was going on but if anyone has any kind of possible explination, pls let me know!!!!!!!