i was thinking about that... it's actually not irony at all. it's just stupidity.
it's like how the only irony in the alanis morrisette song "ironic" is the fact that it is not ironic at all. every situation she explains falls under "well, that just sucked".
Alanis Morrisette didn't understand the concept of irony when she wrote the song "Ironic", which, in itself, is ironic. The biker's death is in deed a sad sad irony...