BTW I've worked it out!

It is a lion and it is also an Australian beast.

Some kid has been playing with his chemistry set, a la, Jurassic Park and recreated a Marsupial Lion.

Look at the evidence:

The Marsupial Lion is the largest meat-eating mammal known to have ever existed in Australia, and one of the largest marsupial carnivores from anywhere in the world (although see Thylacosmilus and Borhyaena). Individuals ranged up to around 75 cm (29.5 in) high at the shoulder and about 150 cm (60 in) from head to tail. Measurements taken from a number of specimens show that they averaged 100 to 130 kg (220 to 285 lb) in weight although individuals heavier than 160 kg (350 lb) may not have been uncommon.[2] This would make it quite comparable to female lions and tigers in general size.

Behaviour

The Marsupial Lion's limb proportions and muscle mass distribution indicate that, although it was a powerful animal, it was not a particularly fast runner. Palaeontologists conjecture that it was an ambush predator, either sneaking up and then leaping upon its prey, or dropping down on it from overhanging tree branches. (Note: similar to drop bears.)

BTW I believe this guy was driving one of the vehicles with a tourist couple when the lion was spotted ->