Dumbest destroyer evasion tatics that worked

[Soviet Creeper]

Title. :D
I was engageing a large convoy fulled with yummy tankers, Spewed off 4 torpedos and got 2 hits on one tanker, and disabled the engine of another. The tanker that I hit twice quickly sank, but as the ocean was very shallow, its nose hit the ocean floor,but its engine was still out of the water. 4 destroyers quickly found me and began depth charging, so in a panic I moved my sub UNDER the tanker, so that the destroyers couldnt get me. After a few hours they ran off, and thankfully the tanker did not end up crushing my sub.

I quickly surfaced and gunned down the other tanker that I disabled, and went back to my home port with only 3 aircraft encounters. Horray.