overzealous
$ \mathrm{overzealous}
/ˌəʊvəˈzeləs/
adjective
showing
too much
energy
or
enthusiasm
An overzealous fan ran onto the stage during the concert.
e.g.
/fe3hdialogue/Balthus×Lysithea#6178d3eabdb0e500002c4a24