Ziplining is one of the adventure sports, which is enjoyed when there are no interruptions.
The undated 44-second video shows a child and a man excitedly starting their zip line ride through a densely forested area.
Fortunately, the sloth and the child appear unharmed but the mammal can be seen raising one hand and curling it.
In the video, the man and the child both appear amused at the unexpected presence of the sloth and curiously watch him move ahead at a slow pace when the video ends.
The origin of the video is unknown and has been doing rounds on social media forums like Twitter and Reddit.
In recent years, many wild animals including sloths have often come in contact with humans due to the encroachment of natural habitats.