When you start flailing your arms and shouting nonsense, this is an example of a situation where you spaz.
Origin of spazaltered from spastic
or spazz Often Offensive Slang
intransitive verbspazzed, spazz·ing, spazz·es
Origin of spazShort for spastic spasm
Offensiveness differs between the UK and the US: it is quite offensive in the UK, while generally mildly offensive or inoffensive in the US.
It is most widely used as a playground term of abuse, both of people with disabilities and children generally. Among adults, particularly in the United States, it can be seen as gentle ribbing or self-deprecation, as in the Tiger Woods quote, but can cause offense, and is recommended against in public.
(third-person singular simple present spazzes, present participle spazzing, simple past and past participle spazzed)