In the filler episode "The Fire-Eater", Goku prepares a Kamehameha in a manner similar to how Roshi sometimes prepares his Kamehameha; using the sweeping arm movements. Goku uses it to blow a hole in the mountain to escape through.
Master Roshi charges The Original Kamehameha in The World's Strongest
Master Roshi firing his Original Kamehameha in The World's Strongest
Misokatsun hit by The Original Kamehameha
Master Roshi prepares The Original Kamehameha in Budokai Tenkaichi