A commuter spotted a real-life alien Predator on the road in Thailand.

The terrifying monster baffled fellow motorists when it was seen cruising down the highway in Mukdahan in the country's northeast on June 15 at 11.30am.

One passer-by said: ''I wondered what was happening. I had to look again. I thought to myself, 'Is this Thailand or is this another planet?' I couldn't believe it. I've never seen anything like that before. Predator just looked so calm.''

The rider in his terrifying costume and custom-built motorbike modelled on the "Alien vs. Predator" sci-fi horror franchise is believed to have been heading to a conference.