In SH3 I was leaving port when an allied raid came in. Went to periscope depth to hopefully avoid the planes and sailed straight into friendly sea mines... Shortest patrol ever. Also had another one in SH4 where I came across a convoy in the Java sea. Checked depth and had enough for a periscope attack. Hit a deep spot so I dove down deeper there to avoid the escorts. After they left, I forgot that i was hiding in a hole and ran straight into the aide of it at 7kts, destroying my bow bulkhead and torpedo tubes, sinking my boat... The list goes on...
