Mr. Whoopee is rarely seen in the suburban areas of Shoreside
Vale. You can also do the fire truck missions and find Mr. Whoopee
on fire, you would have to put out the fire than you can hop in it
and take it to one of your garages and save the game. Also you can
do the "Police" missions and chase after Mr. Whoopee, you would
have to kill the suspect driving the truck than you can drive it to
one of your garages and save the game.