There's no need to soak the snake unless he/she has had a bad shed. Soaking before a shed can actually make the shed worse. Think of it like when we go swimming and come out all wrinkled and thirsty. The water is dehydrating us and making our skin dry. Same goes for the snake.
He likely got extremely scared and everted his vent. They do that in times of stress. I wouldn't recommend soaking him again, unless it's in a small container of water(1/2" max) inside his warm enclosure, and ONLY if he has a stuck shed.
-----
-Becky Brown, RVT-
1.0 Lemon Pastel Classic Jungle(NERD)
2.13 Normals
1.1 Spiders(BHB)
1.1 Yellowbellies(BHB)
1.0 100% Het Pied Classic Jungle(Don Kaye)
0.1 50% Poss. Het Pied(Gary Kettring)
0.1 Classic Jungle
1.0 66% Poss Het Ax Genetic Granite(VPI)
18 07 Hatchlings