migrating worms

yeah of course you've heard of migrating birds
but i tell you, this is for real..
the worms in our backyard just.. migrating..

wiki didnt say anything about it..
i maybe the first one to post this anyway
so like.. last week..
after rainning (yeah i'm cool..)
they just.. migrating..
it happens last year also if i recalled

when they migrating like that..
its fine if they just passing by..
yet they started to get inside the house..
oh dear..
and i'm not talking about a few..
i sweep at least a couple hundred for the past hour!!!
and they move so fast!
i guess about 1 cm per second
gross..

first i thought they just getting cold because of the rain..
and decided to get out to sun bath
and die from heat..
a bit stupid?