Makes the TNT fly onto your head when you put it down, even if you are moving, as if you had driven into it:
800ACD28 000C

Makes the TNT go immediately on your head when you collide with it, without first flying into the air:
800ACFF4 0012

Makes the TNT fly off your head as soon as it touches your head:
800AD590 0003

The three of these together will replicate the Komodo Joe/Oxide effect.

Full code:
80062A24 1DAA
80062A26 0800
800076A8 800A
800076AA 3C01
800076AC 900C
800076AE 8C21
800076B0 0103
800ACD28 000C
800ACFF4 0012
800AD590 0003
800076B2 2402
800076B4 0036
800076B6 A422
800076B8 0008
800076BA 03E0

I got this obscure code years ago, and now I finally remembered to showcase it. The original source is unknown.