Yeah. Someting is wrong.
First of all it happened at the University Baptist Church in Waco, Texas,
Secondly, the church took this pretty hard.Perhaps foul play may not have been ruled out yet.
Their usual web site is down, even the cached pages have been wiped off google, and they put up a holding page:
http://www.ubcwaco.org/2004/ubc_holder.html
The jolt could have come from several places. Perhaps the water rather than the microphone was electrified (as by leakage from heaters that keep the baptismal from getting cold). The microphone then being grounded provided the current path. Does the baptismal have underwater lights like a pool? Another source of current leakage. Someone using a cheater plug to plug a three-prong amplifier plug into an old two slot outlet, combined with electrical leakage existing in the amplifier's power supply. Or the amplifier plugged into a power outlet that has the ground prong wired to the hot side of the line. (Not even a GFCI can help in that situation.)
Foul play? More like demonic possession. Satan did not want this woman baptized!