Line Lock Stuck last night

Trying to finish burnout @ San Antonio Raceway Sat. night and my line lock wouldn't release! Anyone ever have this happen to them? What do you think could cause this? Something in the brake fluid maybe?
http://youtu.be/SJkb0j5fzrw

I've had this happen to me and it would release if I pushed on the brake pedal.
After replacing the line lock solenoid everything worked as it should again.