the sudden spasm of the typing hand on the keyboard, causing a jumble of random letters, usually done when a person is bored chatting with someone online, or to avoid a question or difficult situation
Example of a hand seizure used in a situation:
Olivia- "Hey Mark"
Olivia- "so i think we should talk about the 5 grand you owe me"
Mark- "asethjabn rgn aeut"
Olivia- "what did you say?"
Olivia- "i'll be sendin you an email"
Olivia Clark has logged off
Mark Mcdreckor has logged off