This is getting serious!
This article contains spoilers. It might spoil your gaming experience when first playing these games.
Welcome to the Jungle is the 39th level of Serious Sam 2.
Serious Sam is forced to go through another arena, but this one is divided into two events. The first one makes Sam have to look for five golden coins while under attack by Kleers and Tank Bio-mechanoids. There is a time limit, and he dies if he doesn't complete the task within a minute.
After grabbing the five coins and reaching the exit, Sam is sent to the next event. In this event, he must roll a HAM-Z-rr314 Rollerball through several rings made out of fire in an obstacle course under three minutes. He does two laps of the obstacle course while under attack from enemies, then runs to the exit, which signals the end of that evening's event.
There are no secrets in this level.