Many Christians of different denominations have reported encounters with demon-possessed individuals. Catholic exorcists are an obvious example. In the mission field, reports of demonic possessions in the 10/40 Window are not unheard of. An interesting first-hand account by a SDA missionary can be found here. Even Baptist pastor John Piper has had his fair share of experiences with the exorcism of demon-possessed people.
Have Jehovah's Witnesses ever reported similar encounters with demon-possessed individuals in the mission field or in other contexts?