Well I've seen all sorts, but generally the theatrics leave me cold. I would lay claim to having been "baptised in the Spirit" right at the start of my Christian walk, but I've never spoken in tongues even though I've been prayed over for the purpose by some well-meaning friends.
Charismatic Pentecostals are at the extreme end of the Christian spectrum that is very often plagued by very poor theology. Their claims that you can't be a Christian unless you've been baptised in the spirit and speak in tongues is entirely groundless. Their wacky behaviour is generally deplored by most other denominations as disorderly.
Hope that helps.