Mohamed’s first message was received while in a meditative trance. At that time, his revelations were accompanied by mysterious seizures.

Compare this with Gabriel’s visitations to Daniel, Zechariah and Mary.  None of these people had seizures, although Daniel fell into a deep sleep because of the Supernatural Power of the Angel of God

Secondly, one should also make comparisons with the infilling of the Holy Spirit of God. Mohamed claims that Allah is the same God that appeared to Moses and the other prophets in the Bible.

However, from ancient times, people filled with  the Spirit of  God reported positive and not negative phenomena.

Later in history, a mass infilling on the Day of Pentecost produced a state of exhilaration. The disciples also spoke in languages foreign to them and inducted 3000 people into the Church that Jesus instituted.